Green’s Dictionary of Slang

1. a Yugoslav; also as adj.

1941		J. Archibald ‘Dog Collared’ in Popular Detective Oct. 🌐 I think she’s Hungarian. He’s one of them Jugo slobs.
1989		Hackworth & Sherman About Face (1991) 36: The Yugoslavs’ (or ‘Jugs’ as we called them) side.

2. (Aus.) an immigrant from former Yugoslavia.

1954		Bulletin 19 May 21: ‘Where did he hit me?’ ‘What!’ ‘The Yugo – with his gun.’.
1973		H. Williams My Love Had a Black Speed Stripe 46: We filled him in about Johnny, the young Yugo.
1981		National Times 13 Sept. 22: ‘What we call Yugos,’ he said, ‘they seem to mix in a bit better, they come in here and have a drink.’ [GAW4].
1992		Tel. Mirror (Sydney) 15 Jan. 18: Yugo visitors [heading] More than 400 visitors from Yugoslavia have taken advantage of the Federal Government’s offer to extend their stay on in Australia because of the civil war [GAW4].