Definitions by Eggman the walrus

warm gun 

A 'warm gun' ins a term made famous by The Beatles and is most commonly referred to as a syringe filled with heroin.

It is also sometimes referred to the 'good feeling' you get after firing a gun.

"Happiness is a warm gun (bang bang, shoot shoot)."

warm gun by Eggman the walrus November 4, 2007