Green’s Dictionary of Slang

fly n.5

[SE fly, a throw, a toss]
(Aus.)

1. the act of tossing a coin; esp. in a game of ‘two-up’.

[Aus]C.J. Dennis ‘The Crusaders’ in Chisholm (1951) 81: I got a bit of pelf, / An’ thort I’d like to take a little fly.
[Aus](con. 1941) R. Beilby Gunner 297: I’ll have a fly for a quid.

2. in fig. use, a try, a ‘go’; esp. as give it a fly

[Aus]C.J. Dennis ‘Jim’s Girl’ in Digger Smith 68: You ’ave a fly; yeh’re sure to score.
[Aus]K.S. Prichard Working Bullocks 129: ‘Might give him a fly,’ Red admitted.
[Aus](con. 1941) R. Beilby Gunner 297: I’ll have a fly for a quid.

In phrases

give it a fly (v.)

(Aus.) to give something a try.

[Aus]Truth (Sydney) 28 Oct. 1/2: I’ll never have another ‘fly’ / btween the ropes for gonce and gore.
[Aus]C.J. Dennis ‘The Battle of the Wazzir’ in Moods of Ginger Mick [unpub. unrevised proof version] An’ they wouldn’t be Australian ’less they give the game a fly . . .
[Aus](con. WWI) A.G. Pretty Gloss. of Sl. [...] in the A.I.F. 1921–1924 (rev. t/s) n.p.: give it a fly. To make the attempt, to try a certain course of action.
[Aus]T. Wood Cobbers 19: They come in for miles, some of ’em, to give it a fly.
[Aus]L. Glassop Lucky Palmer 75: We’re playing with their dough, dear [...] Might as well give it a fly.
[Aus]Cusack & James Come in Spinner (1960) 322: I’d come in with yer fifty-fifty if you’d give it a fly.
[Aus]J. Wynnum I’m a Jack, All Right 66: I’m prepared to give you a fly for a day or so.
have a fly at (v.)

(mainly Aus.) to have a try, to make an attempt.

[Aus]Mercury (Hobart, Tas.) 30 Sept. 3/4: [from Daily News, London] After conducting them solves with perfect propriety [...] as domestic servants, they will suddenly leave their places and resume their old habits, or, in their own slang, ‘have a fly’.
[Aus]Bulletin (Sydney) 12 Dec. 44/2: I d’no ’ow ’e goes on stump jerkin’. ’E’ll ’ave a cut at it, though. ’E’s one ’o these ’ere coves ’e’d ’ave a fly at anythink.
[Aus]F. Garrett diary 1 Nov. 🌐 Latest rumor – we may have a fly at Salonica.
[Aus]Baker Popular Dict. Aus. Sl.
[Aus]P. White Burnt Ones 152: Provided it is not you [...] who are having a fly at doing good, I shall not worry all that much.