touch up, n.² — Green’s Dictionary of Slang

touch up n.²

[SE touch up, to strike with a whip]

(Aus. Und.) a beating.

1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Touch up. A punch or a fight. As in ‘give him a touch up.’.
2004		M.B. ‘Chopper’ Read Chopper 3 3: Dave stepped in and gave him a slight touch-up.