This is another YouTube and school age challenge where the participant puts as many full sized marshmallows in their mouth and then has to repeatedly say “Chubby Bunny”.  There are some variations to the game but I found some “rules” and have listed them below.

“You can play Chubby Bunny with as little as two players but you can incorporate as many players as you like.  The game can be taken in individual turns, or you can have each player continue until he is no longer able before moving on to the next one — it’s up to you. 

After each marshmallow is inserted, the player must say “Chubby Bunny.”  When the player’s mouth is so filled with marshmallows that he cannot recite “Chubby Bunny” audibly, or he ejects one or more marshmallows from his mouth, his turn is over and the score is tallied. 

The player who successfully inserts the greatest number of marshmallows into his mouth and says “Chubby Bunny” wins.”

This game has resulted in the death of at leas 2 participants (one was only 12).