What is "chubby bunny"

n. A game in which players attempt to speak a phrase through an increasing number of marshmallows placed in the mouth.

Chubby Bunny is an informal recreational game that involves the placement of an increasing number of marshmallows or similar items such as cotton balls into one's own mouth and stating a phrase that is intended to be difficult to say clearly with a filled mouth. The game is often played where marshmallows are readily available, such as around a campfire. Variations include similar sounding phrases such as Fluffy Bunny, Yummy Bunny, Chubby Monkey, and Pudgy Bunny.

Although the origins of the game are unknown, it may go as far back as 1959 when the Peanuts comic strip from February 28 of that year showed Snoopy's mouth being filled with an increasing number of marshmallows.