1 definition by JohnnyChest
When you catch a fart in your hand (make sure its warm and smells disgusting) and throw your hand in someone's face.
Josh: Hey! Uncle Tom! I totally just buttercupped your son!
Uncle Tom: That's nice. I'm sure he'll love you for that one!
Uncle Tom: That's nice. I'm sure he'll love you for that one!
by JohnnyChest July 29, 2010