Green’s Dictionary of Slang

1. a conventional person.

1967

Oz 5 [poster format] n.p.: This bizarre cult of grey, short-haired nine-to-fivers is sweeping the country [...] In fact most people are Alfs these days.

2. (Aus.) the unsophisticated, nationalistic, basic Aus. male; recently overtaken by ocker n.

1960		M. Sayle in Encounter (London) May 28: The Australian worker, the ‘Alf’ as we call him [Simes:DLSS].
1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxii 6/1: alf: A stupid person.
1974		Australasian (Sydney) 23 Nov. 21: He does not want to show his films in the film workshop co-op settings and they are too way out for your ordinary Alf [Simes:DLSS].
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 17: Alf Foolish person.
1986		R. Beckett Dinkum Aussie Dict. 4: Alf: A fool.
1999		G. Seal Lingo 121: A similar term to ocker is – or was – alf, a derogatory abbreviation of the male forename, Alfred. Popular in the 1960s and 1970s with much the same generic clout as ocker, the oafish alf seems to have slumped into sullen silence, another casualty of generational change.