Green’s Dictionary of Slang

(Aus.) a drink.

1907		Sun. Times (Perth) 9 June 4/6: But the proudest pea of all who lapped the pale Imperial shick / Was Rason, who in London represents us.
1910		Truth (Perth) 1 Oct. 4/7: We are pleased you understand, / Bishop Wright, / The lingo of our land / Terse and trite; / When you hear ‘Lor strike me blue, / Don’t you think it’s up to you / To spar up a shick or two?’ / You’ll be right.