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
- radiation chemist
- radiation chemistry
- radiation damage
- radiation efficiency
- radiation field
- radiation fog
- radiation frost
- radiation hazard
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- radiation pattern
- radiation pressure
- radiation pyrometer
- radiation pyrometry
- radiation resistance
- radiation sickness
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- radiative
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- radiative equilibrium
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- radiatively