Green’s Dictionary of Slang

1. (UK Und.) skilfully.

1886

Aberdeen Jrnl 5 Nov. 2/5: In one corner four boys are learning how to ‘knap a fogle fly’ — i.e., steal a handkerchief skilfully .

2. (US black) smartly, fashionably.

a.1955

‘Good-Doing Wheeler’ in D. Wepman et al. Life (1976) 73: His fabulous sky was broke so fly / That the city had it banned.

3. in an effeminate manner.

1987

R. Campbell Alice in La-La Land (1999) 168: You sure she’s a girl and not some shit-chute poke acting fly?