Top Definition
A cab heater is a term decades old from the trucking industry. A cab heater is a gun used for the driver’s protection. It can be a handgun either a revolver or a semi-automatic pistol or even a pump shotgun if space permits. Most of these weapons are acquired from the underground element so if used, they can be pitched and no link or connection to the driver can be made. Today, any gun in the passenger compartment of any vehicle can be called a cab heater.
Driver 1: Awe Shit, my first stop is on the East Side of Cleveland.

Driver 2: Sucks to be you. Hope you have a cab heater.
by The CLE Steamer May 11, 2009

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