Green’s Dictionary of Slang

a junior or aspirant ‘good-time girl’.

1983		Phila. Dly News (PA) 28 Nov. 40/4: ‘I could sit with some third-rate hunk or bimbette from a canceled sitcom and tear them to shreds’.
1989		C. Hiaasen Skin Tight 112: You told that bimbette we’d send her to Hawaii.
1999		N. Cohn Yes We Have No 43: The teenage bimbettes with their halter-tops.
2000		Observer Rev. 9 Jan. 16: The selfish, foolish bimbettes we met during BBC1’s chilling two-part documentary.
2018		I. Welsh Dead Man’s Trousers 81: [H]usband-hunting suburban bimbettes.