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
-Aw dude, that's just sick man! Was it good?
-na, tasted like poop