Green’s Dictionary of Slang

(Aus.) violence, a fight.

1946

Kiama Reporter (NSW) 14 Aug. 3/4: On the sideline one Gerringong supporter continually referred to members of the Kiama team as ‘logs or lumps of cheese.’ [...] Jim O’Keefe was graded in the latter category. A bit of ‘Whack Ho the Diddle Ho’ seemed imminent when a Kiama barracker resented his remarks and told him so.