AMA

It is an acronym for "Ask Me Anything".
It is usually seen on Reddit.

Redditor: I work at the Pentagon and I survived 9/11. "AMA"

by Wizeoldman November 15, 2011

Muzzle

the act of getting the mouth/brain/dome/head. basically getting your rod cleaned.

Bob: dude did i just see you and katie walk out the bathroom together?
Jim: yea dude, i got the muzzle.

by Wizeoldman November 13, 2011