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
- grief
- grief counselling
- grief counsellor
- griefer
- griefing
- grief-stricken
- Grieg, Edvard
- Grier, Robert Cooper
- Grierson, John
- grievance
- grievance procedure
- grieve
- griever
- grievous
- grievous bodily harm
- grievously
- grievousness
- griff
- Griffey, Ken
- griffin
- Griffith, Arthur
- Griffith, D. W.
- Griffith Joyner, Florence
- griffon
- griffon vulture