Green’s Dictionary of Slang

brigade n.

any collection of supposedly like-minded individuals, e.g. the dirty mac brigade, middle-aged men with a taste for pornography.

[UK](con. 1840s–50s) H. Mayhew London Labour and London Poor I 244/2: People got ‘fly’ to the ‘shallow brigade’; so Peter came up to London.
[UK]Mirror of Life 28 Apr. 3/1: [T]he other day one of two brothers well known in Rosebery Avenue (members of the no work brigade) [...] started on young ‘Pop’.
[UK]‘Doss Chiderdoss’ ‘The Protean Policeman’ Sporting Times 26 Nov. 1/3: Seeing how they trap the ‘lay the odds’ brigade, / That it doesn’t seem to work when there’s a murderer to find.
[US]G. Bronson-Howard God’s Man 181: Arnold became one of the Silk-Hat brigade.
[UK]F.D. Sharpe Sharpe of the Flying Squad 249: He and some friends of the muffler brigade are said to have dined at a famous hotel in the Strand.
[UK]K. Waterhouse Jubb (1966) 178: Hello, thought I, don’t tell me this is an invasion by the beatnik brigade.
[US]K. Brasselle Cannibals 326: Unless you want me to ‘yes’ you like your brown-nose brigade.
[US]S. King Dead Zone (1980) 177: It’s a gimmick for the blue-rinse brigade who read the weekly tabloids.
[US]G. Tate ‘Beyond the Zone of the Zero Funkativity’ in Flyboy in the Buttermilk (1992) 44: Great if you’re a breaking member of the boogie box brigade.
[UK]J. Morton Lowspeak 32: Burglar Brigade – officers in prison who inspect the anus of a prisoner for concealed drugs.
[UK]Guardian G2 12 Oct. 9/1: The heavy brigade [...] the bodyguard industry was booming.