A firearm- Usually a handgun or revolver. This term came from the 30's mafia/gangster times. When continually fired, the barrel would get very warm- hence the name heater.
"Before we go out tonight, do you got your heater?"
Don't mess with her, she's got a heater.
by g-dog adt March 12, 2011
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means gun. usually a 9mm or anyother pistol. mad popular by book "native son"
let me pull out my heater and roll on these bustas
by carribean saint January 12, 2005
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I believe in common usage that heater is a term now applied to all firearms, not only fully automatic firearms.
by jgpixfed October 20, 2003
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"i know heater prices in new york are ridiculous but let me bum a heater bro"
by soxsfan58 May 6, 2009
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A hot fart. A fart where you can feel the warmth in your drawers long after the gas was passed.
"Keep your distance, I've been rippin' heaters all night".
by harold mann September 15, 2010
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Any gun.
Called like that cause it heats up the gun when you shoot it(quite obvious).
If that muthafucka fucks with me Ima bring the heat to him.
Jack pulled out his heater and busted 12 at his head.
Johnnay packs more heat than the oven.
by Johnnay April 25, 2003
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