gang bang 
informal
noun
1The successive rape of one person by a group of people.
1.1A sexual orgy involving changes of partner.
2North American An instance of violence involving members of a criminal gang.
verb (gang-bang)
1 [with object] (Of a group of people) rape (someone).
2 (as noun gang-banging) North American The violent activities of a criminal gang.
Derivatives
gang-banger
- asylum
- asylum seeker
- asymmetric
- asymmetrical
- asymmetrical conflict
- asymmetrically
- asymmetrical warfare
- asymmetric bars
- asymmetric conflict
- asymmetric warfare
- asymmetry
- asymptomatic
- asymptote
- asymptotic
- asymptotically
- asynchronous
- asynchronously
- asynchronous transfer mode
- asynchrony
- asyndetic
- asyndeton
- as you do
- asystole
- asystolic
- (as) —— as all get out