an intuition about whether someone is homosexual; a homosexual person's ability to identify other homosexuals through intuition or interpretation of signals
n. the remarkable sense that allows someone to spot gay people. (Word play.) : Looks like he picked up somebody on his gaydar.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
Cite This Source
(gā'där) 
dɑr