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.
by g-dog adt March 28, 2011

by notorious-d January 22, 2004

by carribean saint January 11, 2005

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

another word for a cigarette
by soxsfan58 May 05, 2009

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.
Jack pulled out his heater and busted 12 at his head.
Johnnay packs more heat than the oven.
by Johnnay April 25, 2003

by harold mann September 15, 2010
