look up any word, like sneak easy:
 
1.
1. In the game of baseball, when the pitcher is struck with a batted ball.

2. The resulting injury.
1. Man, that flener made a sick noise!

2. Look at that flener...it's so swollen!
by LunchBoxer September 22, 2008
 
2.
"a bitch, bastard, cock sucking, cum bag, etc"
any person who constitutes any inappropriate word ever created
"dude that guy is such a flener"
by chode doak August 26, 2008