Green’s Dictionary of Slang

1. (W.I.) dated, unfashionable.

2000

T. White Catch a Fire 341: [They] had begun salting their own bawdy dancehall toasting with ‘beat down de fence’ salutes [...] in order to avoid being mocked as ‘dibi dibi’ (dated) figures at the microphone stand.

2. (also dibi dibi) a promiscuous woman.

1995

L. Stavsky et al. A2Z 27/2: dibi dibi [...] Don’t get serious with that dibi dibi.