Green’s Dictionary of Slang

1. an act of ingratiation, sycophancy.

1898		Worker (Brisbane) 13 Aug. 1/1: [heading] The Policy of ‘Smoodge’.
1905		Sun. Times (Perth) 10 Sept. 4/2: Not since the diminutive Dook of York dropped in here has the class which abases itself to rank indulged in such transports of tuft-hunting, such saturnalias of smoodge.
1911		Worker (Brisbane) 16 Sept. 14/1: [heading] When Denham was on the Smoodge.
1911		E. Dyson ‘The Picnic’ in Benno and Some of the Push 4: ‘Don’t I like yer pink cheek, polin’ in on ’er bloke’s ticket, ’n’ then doin’ the smoodge with his cobber.’.
1915		Cairns Post (Qld) 2 Sept. 4/3: Is It a Smoodge? [...] The general opinion is that it is merely part of a new movement to curry favour.
1919		Carins Post (Qld) 1 Apr. 5/1: [heading] Bit of a Smoodge.

2. wheedling tones.

1907

Sun. Times (Perth) 20 Oct. 5/7: The cove with the smooge in his voice / Is always the artfullest dodger.

3. by ext., a party.

1905

Sun. Times (Perth) 10 Sept. 1/4: Some choice rag-tags secured admittance to Governor Northcote’s levee [and] there will be considerable thinning out when the next smoodge come [sic] round.

4. (Aus.) sexual embraces short of intercourse, petting.

1910		Sun. Times (Perth) 1 May 2nd sect. 9/1: They Say [...] That a well-known Fremantle Lothario doesn’t love the light. That in place of public streets and gardens be takes his lady-love up and down lanes. That scores of his friends are aware of these insanitary smoodges.
1913		Sport (Adelaide) 2 Aug. 9/1: You had better chuck it, Laurie; it’s a long way to go for a smoodge.