Green’s Dictionary of Slang

strange adj.1

[note Leaves from the Diary of a Celebrated Burglar and Pickpocket (1865): ‘Jimmy Glindon [...] had left her because of her great relish for strange “blokes” during Jimmy’s absence on the “dip”.’]

1. of women, unknown, hitherto unencountered.

[Aus]H. Lawson ‘Send Round the Hat’ in Roderick (1972) 475: It appeared that that there woman and them girls were strange women, in the local as well as the biblical sense of the word.
[US]‘Hal Ellson’ Tomboy (1952) 164: Do you want to bust in on the church dance? [...] There ought to be some strange stuff there?
[US]M. Braly On the Yard (2002) 111: Any man figures to get something strange ever’ once in a while. That’s nature.
[US]G.V. Higgins Digger’s Game (1981) 75: Maybe I try a little strange tail.
[US]C. Stroud Close Pursuit (1988) 225: You’re wading through all the strange pussy a man can handle every night.

2. (Aus.) homosexual.

[Aus](con. 1945–6) P. Doyle Devil’s Jump (2008) 162: ‘Are you trying top tell me Mick Toohey was strange?’ ‘Queer as a corkscrew.’.

In phrases

don’t be strange

(Polari) don’t restrain yourself.

[UK]P. Baker Fabulosa 291/2: don’t be strange! don’t hold back!