Green’s Dictionary of Slang

(Aus.) a kiss.

1948		Smith’s Wkly (Sydney) 25 Dec. 6/2: [S]he grabbed you round the neck and half smothered you with a smoush.
1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xl 4/4: smoush: Kiss.
1976		D. Ireland Glass Canoe (1982) 198: I gave her a few smoushes, ask her how she’s getting home.
1983		J. Byrell (con. 1959) Up the Cross 71: They had a real good smoush. And then they went to bed.