Green’s Dictionary of Slang

1. a prostitute.

1967		E. Roach Bel Fanto 50: Harlot, whore, prostitute, jezebel, jamette That is what you know bout woman.
1972		S.D. Ryan Race and Nationalism in Trinidad and Tobago 471: The ACDC-DLP was dismissed as a ‘jamette (prostitute) association’.
1975		L. Kwesi Poems of Tebellion n.p.: They name her names: had seed slut whore jamette solicitor of passengers.
1996		Allsopp Dict. Carib. Eng. Usage.

2. a woman widely recognized to be promiscuous; also attrib.

1977		H. Liverpool Carnival in Trinidad 49: Jamette behaviour was thus linked by these social aristocrats as anything from prostitution, rum-drinking to dancing in the streets.
1998		J. Cowley Carnival, Canboulay and Calypso 123: The jamettes were expressing ‘solidarity without authority’. They represented revolt, obscenity (the flouting of taboos), fearlessness, and rejection.
2000		R. Antoni Grandmother’s Erotic Folktales 173: There she was posing like a jamette up against the Cadillac on Tanzania’s side!
2007		S. Dudley Music from Behind the Bridge 103: The term jamette may refer [...] specifically to underclass women whose ostentatious behavior in carnival drew moral disapproval from ‘respectable’ people.

3. a woman’s breast.

2006

R. Antoni Carnival 162: Shay-lee squeezed her own breasts [...] winking at me, ‘Perfectly decent jamettes!’.