A makeshift cannon for shooting potatoes, usually made from PVC pipe. The two major varieties are pneumatic guns, which rely on compressed air, and combustion guns, in which a flammable chemical such as hair spray is ignited.
Guy at the hardware store: "I love shooting spud guns, just be careful not to blow a hole through your liver".
A derogatory term for a homosexual male. Deriving from the small portions of faeces that can get stuck in the eye of the penis during unprotected anal sex being similar to the portions of potato that get pulled out when a small hand-held SpudGun is inserted into the potato to 'load' it.
Spud Gunning (v.) - The process of going to the store and purchacing a ten pound bag of potatoes and can of hair spray. Once the supplies are purchaced put them in the back of a pickup truck along with a potato cannon. Next drive out to a remote desert location and shoot the potatoes!
My friends and I went spudgunning for three hours this weekend. It was bomb.