Acronym for All Cops Are Bastards. Great Oi! band from Malaysia (now defunct). Also a song from 4-skins lp 'the good, the bad & the 4-skins' from 1982, pre-dating any white power nonsense.
A.C.A.B. got their name from a song but they were still a great band!
stands for All Cops Are Bastards.
the coppers beat up on a kid holding up a sign that read "A.C.A.B."