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 23, 2008
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"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
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