The ability/gift to detect lesbianism in other people. Similar to gaydar, but specifically for the females.
She's wearing flannel AND Birkenstocks? My lesdar is going haywire!
by JimTX July 18, 2007
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The sixth sense that tells you a woman is homosexual.
She looked hot from across the room, but when I approached her my lesdar went off.
by scott777 April 11, 2008
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