bumshake 

wen u skake a bottle containing out of date pineapple juice and it makes a froth similar to a shake but from ur bum.

oh danm i gt bumshake all down my new top.

bumshake by sophie-0x February 23, 2008

bumsnake 

another name for a back door salesman i.e. butt pirate

I was out last night sucking cock and banging arses!
Man you're such a bumsnake!

bumsnake by markthegreat March 5, 2007

Butshake 

When you'v done a girl in the pooper, you pour in some milk and throw in a straw. then you wait for her ass to close up and use the straw to drink the milk.

-Hey dude, i did a butshake on jennifer yesterday!
-Aw dude, that's just sick man! Was it good?
-na, tasted like poop

Butshake by hiddennnnnnnnnnn February 22, 2009