Wiktionary
n. A celebrity who is also famous for being a lesbian.
Wikipedia
The term celesbian (a portmanteau of celebrity and lesbian) originally referred to a female celebrity known or reputed to be a lesbian and popular within the LGBT community. Celesbianism as a Western media phenomenon came into vogue in 2008, when several female celebrities presented themselves as lesbians. The term was first used by New Yorkers Pam Franco and Susan Levine, a disk jockey. It was used in a full-page ad in a lesbian nightlife magazine, GO MAGAZINE. The ad was for the Mz Hip and Fit NY contest, the idea of Denise Cohen of Denco Designs & Events. The contest was a search for the hottest lesbian in the United States. The term celesbian was used for the celebrity lesbian judges.