When your fucking a girl in the ass while at your kitchen table and eating delicious beef wellington.
Last night my girlfriend made me delicious beef wellington so i figured i would take advantage of the situation and performed the dirty cosby.
by Dirty Cosby October 17, 2007
by Pfc. Snowball August 28, 2008
When your doing a girl in the ass and you take your dick out dip it in a pudding pop and make her suck your dick.
by Scott Vista December 07, 2007
It is when after having a roofie slipped to you, the person performing the cosby shoves rocks into your vagina and then pisses on you. after then, he shits his pants, grabbing a hand full of shit and smearing feces onto your face
by MikeTheNigger February 25, 2017