Definitions by Fish-o-matic

gang bash 

When a gang or a large number of people beat the living shit out of a smaller group of people (usually 1,2 or 3 people).

*Also see gang bang for similar meaning

Tim got charged with assault again, he and some mates were caught gang bashing some dudes over on West 12th St.

gang bash by Fish-o-matic March 28, 2008