verb: to quarter-turn, performing a quarter-turn
noun: a quarter-turn
The act of turning around with your ear facing the person in the seat behind you, as a result of his noise-making.
This is usually far less effective than the half-turn and is usually followed by it, since the noise never stopped.
*sitting in the theatre, talking*
Irritated dude #1: shushh!
Me: did someone just shush me?
*Irritated dude #2 quarter-turns*
Me: oh my god that dude just quarter-turned me, what a douche! Man this movie sucks. Hey, remember that time....