(Need more Puuuns..)

Papyrus: Sans! Get your lazy bones up and work!
Sans: Gee, Pap. You don't have to be so-

Papyrus: Sans...

Sans: BONEY about it! heh
Papyrus: Nnggg----.

Papyrus: SANS! 

Papyrus: I swear... ICE CREAM (I'll scream) if you make another joke again!

Both: ...

Both: Pfft-

Sans: Hehehe! You got me there Pap, your the best...
Papyrus: Nyehehe!! I, The Great Papyrus! Got you, brother.

(I got the puns yesterday when I was eating Ice cream with ma sis.. then the word "I'll scream" popped out in my mind)