Green’s Dictionary of Slang

gang n.1

1. [late 16C+] (orig. US, also ging) any social group (with no criminal overtones).

2. [19C+] (US) a large amount of anything.

SE in slang uses

In compounds

gangbang/banger/banging

see separate entries.

gangbuster(s)

see separate entries.

gangfuck/fucker

see separate entries.

gang roll (n.) [roll v. (1)]

[late 19C] (US) a sexual orgy or gang rape.

gang-shag

see separate entries.

gang-splash (n.) [SE splash, i.e. of bodily fluids]

1. [1960s+] (Aus./N.Z., also gang-bash, gang-slash) a heterosexual orgy or multiple rape; also as v.

2. [1960s+] (US gay/prison) a homosexual rape or orgy.