Green’s Dictionary of Slang

slop n.6

In phrases

get slops (v.)

(Aus.) to receive bows, a beating.

[Aus]Sydney Sportsman (Surry Hills, NSW) 11 Sept. 2/6: But to listen to them howlers / Ain’t no game fur such as they; / They’d get slops from off their bludgers, / Waitin’ just across the way.