Green’s Dictionary of Slang

carlotta n.

[the effeminization used by the camp gay world]
(camp gay)

1. a heterosexual who interferes in the gay world, either as a homophobe or as a ‘tourist’.

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[US]B. Rodgers Queens’ Vernacular.

2. a popular ‘camp’ name.

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[US]B. Rodgers Queens’ Vernacular 42: Carlotta (camp) names often hurled at hassling heterosexuals ‘Kiss it, Carlotta!’ & ‘Suck it, Carlotta!’ are more offensive than ‘Eat dick,’ etc.