butt jammer

A guy who does anal sex. Usually applies to a straight guy.

That guy's a butt jammer.

butt jammer by Michael October 18, 2003

Buttrammer 

A Homosexual who likes to take it in the anus. Can be used as a funny insult to your friends.

"Go away you Buttrammer!"
"Dude, that guy over there is a buttrammer"

Buttrammer by Garcia, Frank May 7, 2007