Definitions by DonPedro

thumbcake 

Someone who tries to ruin a party or gathering by doing something anti-social, i.e. someone who looks at a beautiful birthday cake and sticks their thumb in it. fuckhead dumb fuck punk ass bitch moron

Billy just sh*t in the punchbowl...that guy is a real thumbcake.

thumbcake by DonPedro April 28, 2005