heater(redirected from a heater)
1. slang A gun. Hey man, I wouldn't go to that seedy part of town without a heater.
2. slang In baseball, a fastball. Come on, let me pitch to this guy—there's no way he can hit my heater!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a pistol. (Underworld.) Put your heaters away, boys. This is a job for reason.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.