Green’s Dictionary of Slang

1. (US) showy, stylish.

1911		L. Pound ‘A Second Word-List From Nebraska’ in DN III:vii 543: floozy, adj. ‘Flossy,’ or ‘sporty.’ [...] ‘What a floozy hat.’.
1928		Hecht & MacArthur Front Page Act I: How long do you think you’ll last in that floosie job?
1939		Derby Dly Teleg. 17 Nov. 7/4: [headline] A Floozie dress Shop.
1961		L. McMurtry Horseman, Pass By 71: The upshot of it was that we all ended up working in the garden [. . . .] She even had Hud out picking peas in his floosy pants.

2. (US) over-dressed, over-made-up.

2006

D. Mitchell Black Swan Green 111: You’ll [...] pick up VD from some floozy greek temptress.

3. (US) silly or light-headed.

1946		E. Wilson Pikes Peek or Bust 19: [I]n the play Born Yesterday [...] Paul told his floozy girlfriend, Judy Holliday, ‘You’re not so smart. You don’t even know what a peninsula is.’ ‘Oh yes, I do,’ she answered. ‘That is the new medicine’.
1949		H. Miller Sexus (1969) 470: Ratty, jailbird types, if male, and floozy, empty shits, if the other sex.

4. (US Und.) immoral, corrupt, dissipated.

1933		Ersine Und. and Prison Sl.
1969		L. Hadow Full Cycle 179: Ma handled the front bar and the floosy barmaid flirted with the bank clerk in the saloon.

5. (US campus) sexy.

1976

Eble Campus Sl. Nov. 2: floozy – sexy. That blond in the low cut blouse sure looks floozy.