heater 

A gun.
Any kind of gun.

It's called a Heater, Because when you pop shots off, You're attracting unwanted attention from the police. As such, The situation is getting "Heaty" due to the sound coming from the "Heater"

"Nine millimeter heater stashed in two-seaters"

- Eminem.

heater by ChillerTheBabyKiller April 22, 2005

heater 

A ciggarette

Hey can I bum a heater

heater by Jesse October 29, 2003

Heater 

A quick, powerful punch. In most cases to the face.

Yoooooooo you see that?- Will
Nah what happened?- Jake
Ryan just hit that nigga wit a heater- Will

Heater by ugotkuhmdawn February 10, 2020

Heater 

A gun, not always loaded, typically a 9mm hand gun. Used if loaded to shoot(DUH) Unloaded good for a bluff.

Dally: We can't walk alone at all. I started carrying a heater...

Ponyboy: Dally! You kill people with heaters!

Dally: You kill 'em with swtichblades too don't ya kid? Don't worry it ain't loaded. I ain't aimin' to get picked up for murder. But it sure does help a bluff.

Heater by Littlexxpuppet January 4, 2011

heater 

a gun usualy a .45 colt 1911 a popular handgun of the 1930's

"Tommy make sure you pack a heater for this job."

heater by .911.AZBDC January 11, 2008

Heater 

A cigarette. A dart; square. An amount of tabacco rolled or made for use of smoking.

Man, Chucky was so drunk last night, he threw back like a whole pack of heaters.

Heater by Austin Tyrrell January 2, 2008

heater 

a gun,gat,burner, 50 cent packs heat yo

You got clapped by joshes heater

heater by Jay Co October 18, 2004