a.b.h., n. — Green’s Dictionary of Slang

a.b.h. n.

[abbr. SE actual bodily harm, physical harm deliberately inflicted, but less serious than grievous bodily harm]

a beating up.

2000		J.J. Connolly Layer Cake 160: I think Tiptoes might have threatened the righteous one with a bitta ABH or something stronger.
2004		(con. 1982) N. ‘Razor’ Smith Few Kind Words and Loaded Gun 260: They found both Steve and Popeye guilty of assault (ABH) and affray.