Measurement;
Fox-length: About the length of a fox; approximately a yard. (80 cm)

Kittenstep or kitstep: About the length of kit's step; approximately an inch or a half inch. (1.25-2.5 cm)

Tail-length: About the length of a cat's tail; approximately a foot. (30 cm)

Rabbit hop or rabbit length: About a foot and a half away. (45 cm)

Mouse-length: About two or three inches. (5-7.5 cm)

Pawstep: About the length of a grown cat's step, roughly six inches. (15 cm)

Tree-length: About the length of a tree; around 40 to 50 feet. (15 m)

Time;
Newleaf: The season of spring.

Greenleaf: The season of summer.

Leaf-fall: The season of autumn or fall.

Leaf-bare: The season of winter.

Moon: The time between one full moon and the next, spanning about 29 days, a month.

Moonhigh: When the moon is the highest in the sky; about midnight.

Moonrise: The time when the moon rises.

Half-moon: About two weeks, half a month.

Quarter-moon: About a week.

Sunhigh: The point during the day when the sun is highest in the sky; noon.

Sunrise: One day in cat time (i.e. One sunrise ago).

Season: A quarter of a year in cat time. Four seasons equal a year.

Heartbeat: A split second.

Claw-moon: When the moon resembles the shape of an unsheathed claw, equivalent to crescent moon.

Sundown: Dusk.

Sunup: Dawn. However, dawn is still used for example in the phrase "Dawn Patrol."

Locations/Basic Clan Terminology;
Carrionplace: A Twoleg dump.

Crowfood or crow-food: A dead prey animal that has begun to rot; can also be used as an insult.

Cutter: A veterinarian, specifically, though not always, referring to one that spays or neuters cats.

Dirt: Feces.

Fresh-kill: A recently killed prey animal caught for the purpose of consumption. Fresh-kill is hunted by warriors and apprentices, and placed on the fresh-kill pile or brought to the elders. Elders, kits, queens, and sick cats eat first, then warriors and apprentices. Extras stay in the fresh-kill pile.

Gathering: The monthly meeting of all the Clans when the moon is full. There is a truce on this night, and no fighting is allowed.

Greenleaf Twolegplace: A place frequented by Twolegs during summer, such as a resort or camping spot near a lake.

Halfbridge: A boat dock.

Horseplace: A place where horses are kept, such as ranches and stables.

Hunting Patrol: A group of cats hunting for fresh-kill to bring back for their Clan to eat. May fight if there are trespassers.

Kittypet: A domesticated pet cat.

Loner: A cat that lives by itself and doesn't defend its territory.

Making dirt: Defecating.

Molly: Another name for a she-cat.

Monster: A vehicle operated by humans. Often described when cats are near Twolegs/the Thunderpath. Motorboats are sometimes referred to as "water-monsters."

Rogue: A usually hostile cat who does not have a permanent home, roams around, and does not care about crossing Clan boundaries.

Sharing tongues: Cats grooming each other while sharing the latest gossip. A cat lies on the ground, talking, while the other grooms their fur, listening.

She-cat: A female cat.

She-kit: A female kit.

Silver boulder: A boulder that, when the silver disc is pulled off, holds Twoleg rubbish. To Twolegs, they are just trash cans/bins.

Silverpelt: The large swath of stars in the sky. These stars are a direct representation of StarClan.

Silverthorn: Barbed wire.

Smooth boulder-thing: Twoleg ball.

Snowmelt: A term used to describe slush or dirty, melted snow.

Soft boulder: A pillow or cushion.

Tree-eater: A bulldozer.

Thunderpath: A paved road with an extremely acrid smell that cars often go across.

Tom/tomcat: A male cat.

Tom-kit: a male kit.

Twoleg: A human.

Twoleg kit: A human child.

Twoleg nest: A human's house.

Twolegplace: A town, city, or village where Twolegs live.

Expressions;
As easy as swallowing a minnow: A phrase used to indicate easiness of the task.

As much use as a dead fox: A (harsh) insult, meaning the recipient is useless.

Bees in your brain: An exclamation meaning confusion or a cat not making sense. (i.e., You've got bees in your brain!)

Buzzardfood: Alternative of crowfood.

Chickfeed: Alternative of crowfood.

Crowfood: A (harsh) insult comparing the recipient to rotting prey animals (as in I'll turn you into crowfood!), or suggesting that they eat it (as in crowfood-eater).

(You're) crazier than a fox in a fit!: An insult used when a cat (or cats) are acting crazy. Another variation uses "madder" instead of "crazier."

Doesn't matter a whisker/Doesn't catch so much as a whisker: An exclamation meaning the cat does not care, (i.e. it didn't matter a whisker that she didn't share their beliefs) similar to I don't give a mouse tail. Or saying that a patrol didn't catch anything.

Door-mouse - An expression or exclamation used against a cat who sleeps a lot.

Drypaw: A cat that dislikes getting wet, usually used in water-based Clans.

Dungface: A harsh insult.

Like (insert ancient Clan here): An expression stating that a cat does something very fiercely or well.

Flea-brain: A (friendly, yet harsh) insult. Severity of the insult is almost always decided by tone.

Fishface, fishfur or fish-breath: An insult used against water-based Clan warriors.

Frog-dung: Same as fox-dung, except it's often used in water-based Clans.

Fox-dung: A (harsh) insult comparing the recipient to fox feces. Also used as an exclamation. (as in That's fox-dung!)

Fox-hearted: An insult meaning cruel, cold-hearted, or evil (as in fox-hearted Twolegs).

Furball: A (friendly, yet harsh) insult. Severity of the insult is almost always decided by tone.

Fuzz-brain: A (friendly, but harsh) insult. Severity of the insult is almost always decided by tone.

Great StarClan!: An exclamation used to signify extreme surprise or anger. Similar to Oh my god! in usage and to the fact that they both have mention of a higher force.

Hare-dung: Used as an exclamation, similar to "mouse-dung". Somewhat like "Darn it!"

When hedgehogs will fly: An exclamation style statement that shows disbelief that a certain event will likely occur (as in That will happen when hedgehogs fly), used in many variations. Somewhat like the human phrase, When pigs fly!

How in Silverpelt?: An exclamation used meaning "How in the world?"

I don't give a mouse tail/They wouldn't give a mouse tail: An exclamation meaning that the cat does not care. Another variation is I would ____ for a couple of mouse tails meaning that they are willing to do the inserted action for no real reward. Can also mean that a cat would be stingy enough not to share a mouse tail.

I'd have shredded you into mousedust!: to gravely injure, rip to shreds. Similar to mousemeat.

Make dirt: to use the bathroom, or the dirtplace in warrior terms.

May StarClan light your path/Banish all the fleas from your nest: A friendly term used to tell others they wish them well.

May the Sun warm your back and the fish leap into your paws: A blessing used in water-related used to wish good dreams or, in some instances, to say farewell to a dead cat.

May you find good hunting, swift running, and shelter when you sleep: An ancient farewell used by all the Clans, to say goodbye to loved ones on their way to StarClan.

Minnow-brain: An insult that is friendly but harsh.

Mouse-brain: A (friendly yet harsh) insult. Severity of the insult is almost always decided by tone.

Mouse-dung: A (somewhat harsh) insult comparing the recipient to mouse feces. Also used as an exclamation (as in Mousedung! That can't be right!). Somewhat like "Darn it!"

Mouse-hearted: An insult that describes one who is cowardly.

Mousefodder: An insult describing that the cat is worthless or a kittypet.

Once a kittypet, always a kittypet!: A harsh phrase used to describe a cat with kittypet roots.

(Only) StarClan knows (what): Sometimes used to answer a question that is impossible to answer. Similar to "Only god knows what," "Only god knows," and "god knows."

Pain in the tail: An insult meaning a cat is irritating or lazy.

Scaredy-mouse!: A similar expression to scaredy-cat, but in cat terms.

Scaredy-sparrow: An expression also similar to scaredy-cat, in cat terms.

Snake-hearted: Similar to the term "fox-hearted."

Snake-tongue: An insult meaning cold or unfair; similar to "fox-hearted" or "snake-hearted".

Sorry catches no prey or Sorry fills no bellies: Means cats can be sorry, but that will not change the past.

StarClan's kits!: An exclamation of surprise or disbelief. Sometimes used as an exclamation if a cat is hurt.

Tabbies don't change their stripes: means that a cat doesn't change their nature. Equivalent to "a leopard can't change his spots."

What in StarClan's name?: A exclamation similar to "What on earth?" or "What in the world?"

That's a load of badger droppings: A harsh exclamation saying that something is nonsense.

Thistles and thorns: Used to describe bad luck (as in: Thistles and thorns! I blew it!); similar to "Darn it" or "mouse-dung."

You fight/hunt like a kittypet!: An expression used to insult or tease a cat who fights/hunts poorly.

Who made dirt in his/her fresh kill?: A phrase to describe a cranky or suddenly moody cat.

Would've made mousemeat out of you!: To badly injure, rip to shreds. Similar to mousedust.

Who ruffled their fur?: A similar way of saying "who got under their skin?" but in cat terms.

Clan Locations;
Camp: The place where a Clan makes their permanent home.

Leader's den: The den in camp that belongs to the Clan leader.

Medicine cat's den: The den in camp that belongs to the Clan's medicine cat and his or her apprentice. Sometimes referred to as the medicine den.

Warriors' den: The den in camp that is shared between the warriors and the deputy of that Clan.

Apprentices' den: The den in camp that is shared between the apprentices of that Clan.

Elders' den: The den in camp that is shared between the elders of that Clan.

Nursery: The den in camp that is shared by the queens and kits of that Clan.

Dirtplace: The place near the camp where cats go to urinate or excrete.

Fresh-kill pile: The place, usually in the center of the camp, where the warriors drop the prey they caught while hunting, so it is easily accessible to all the cats in the Clan.

Ranks;
Kit: A kitten younger than six moons. In MemoryClan, called Younglings.

Apprentice: A cat at least six moons old, and training to be a warrior (or a medicine cat.) In MemoryClan, called Padawans.

Warrior: A mature cat who has completed his or her warrior training. A she-cat is considered a warrior when she is not currently (heavily) expecting or nursing kits. In MemoryClan, called Knights.

Mentor: A cat who is currently training an apprentice. In MemoryClan, called Masters.

Queen: A she-cat with kits to take care of or who is pregnant with kits, or stays in the nursery helping other queens even though they have no kits. Called calns in some Clans, as to make cats who aren't necessarily female feel more comfortable (as caln is gender-neutral).

Elder: Cats who cannot hunt or fight anymore, sometimes due to injury, loss of sight, sickness, or are just too old to do their warrior duties. They are treated with great respect in the Clan. The apprentices in the Clan take fresh kill to them, pick out their fleas, and change their bedding.

Medicine cat: A cat who heals injuries and/or illnesses, who is skilled with herbs, leaves, and natural cures; and sometimes receives special signs or prophecies from StarClan. In MemoryClan, called Healers.

Deputy: A warrior who is second in command to the leader, helping the leader in their tasks and replacing them after their death or resignation. They organize patrols and make reports to the leader, and are known to be frequently given apprentices.

Leader: A cat who controls the entire Clan. A leader is granted nine lives by StarClan so they "can be first in every battle and last to take a piece of fresh-kill" basically giving them extra time to serve and lead their Clan.

Council: Exclusive to MemoryClan, the Council is a group of cats originally elected by the Clan to lead them. They are not granted nine lives by StarClan, but are the guiding force behind the Clan, as a leader is. New members are elected by the current Council Members, and require a 2/3 majority.

Tail Signals;
Tail Held Erect: Stop

Tail Rippling: Move forward slowly/with care

Tail Held Erect and Sweeping Slowly from Side to Side: Retreat silently

Tail Pointing Low, Parallel to the Ground and Sweeping: Spread out

Tail Flattened: Get down

Tail Bobbing: Enemy sighted

Tail Hooked: Danger

Tail Pointed Sharply: Go that way

Tail Held Erect and Waving from Side to Side: Stay behind me

Tail Kinked over Back: Follow me

Tail Flicking over Back: Leave, but be careful

Tail Tip Facing Other Way - Attack

Stroking another cat's spine or shoulder with the tail is a sign of affection or sympathy. Stroking on the cheek has the same meaning.

Lashing their own tail usually happens in times of anger. However, this can also be a sign of excitement.

Wrapping their tail around another cat shows affection or the need to protect. Mother cats often wrap their tail around their kit(s). The tail can also be used to beckon another cat.

The tail can also show different emotions; a drooped tail, for instance, usually means the cat is sad.

When first starting to hunt, it is instinct to swish their tail, but in order to catch prey properly, the tail must be kept still.

Swishing their tail can mean that the cat is very excited and ecstatic. It can also be a sign of commencing an action or contemplating an important decision.

Lifting their tail up is a form of composure, just as we humans sit up to recompose ourselves.

The tail can be used to brush another cat away if they're not wanted. However, it can also be used for the opposite: to beckon a cat closer.

When a cat cares for another cat, he/she can smooth their fur with the brush of the tail.

A cat can whisk their tail when being conceited to show that they know everything.

Twitching their tail can be a sign that they are skeptical about something.

Crossly whipping their tail is a demonstration of anger.

Flicks;
A sharp flick and an agitated expression usually means the cat is annoyed, irritated, or impatient.

A bristle and a sharp flick of your tail usually means "Get over here now! I'm angry with you!"

A flick and jerking your head in a certain direction means "Meet me to the bushes at your left" or "Sneak out of camp with me through the brambles to the right."

If you call out to someone and their back is to you, they can flick their tail to show that they've heard.

Sticking your tail straight up in the air and flicking it sharply down means "Sit!"

An eye-roll and a flick of the tail means "Whatever."

A mrrow of laughter and a flick of a tail means "That was a good joke."

Saying, "Oh, fox-dung, I gotta go!" and flicking your tail means "Sorry! Talk to you later?" or "Yikes! I've gotta go use the dirtplace!"

Flicking your tail at a she-cat's belly and smiling means "She's expecting kits!"

Flicking your tail at someone and making a face means "What is wrong with him/her?"

A sharp flick of your tail during battle can mean two things; it can mean "Attack!" or "Help me!", depending on the corresponding facial expression.

A shrug followed by a tail flick: "Oh well."

Putting a tail over another cat's mouth means "Shut up, mouse-brain!" when the flick/movement is sharp or "Please, quiet" when the cat is talking too much.

A flick in a certain direction can emphasize that they've got to go or look there.

A normal flick can just be caused in amusement.

A tail flick can be a way to vent anger or rage.

Sometimes a cat can flick their tail when about to say something funny or sarcastic.

A tail flick can also be executed in an arrogant, conceited, or contemptuous manner.

Anxiety is another feeling that can trigger stiff tail flicks.

Though many tail flicks occur in rash emotions, the tail can also be flicked happily.

A tail flick can mean that the cat is bored.

The tail can be flicked playfully on another cat's muzzle.

A flick executed in the air can change the direction the cat will land.

The need to protect can also be demonstrated by a tail flick.

A cat may flick his/her tail to prompt something.

The tail can be flicked in a proud manner.

A cat may also flick their tail when about to give them a lecture on what is right.

Eagerness can cause tail flicks as well.

A tail flicking one way, then the other is used when one is to surround a cat with others.

Beetle-brain – Friendly insult; similar to mouse-brain.

Caught-prey – A dead prey animal caught for the purpose of consumption; similar to fresh-kill.

Time of Freed Water– The season of spring, known to the Clans as Newleaf.

Time of Frozen Water – The season of winter, known to the forest Clans as leaf-bare.

Tribe of Endless Hunting - Similar to StarClan, these are the Tribe's ancestors.

Giving of close comfort - Act of cats grooming each other; similar to sharing tongue