- a gun, especially a shotgun with a short barrel, for quelling riots rather than inflicting serious injury.
Origin of riot gun
Examples from the Web for riot gun
Historical Examples of riot gun
The Colonel ejected his words with the decisive click of a riot-gun.'Me-Smith'
Then he went in and got his riot-gun, well loaded with duck-shot.
So they raged all night, firing at the jail, but not daring to come too near the man with the riot-gun.