fly-in noun an extravagant party for homosexual men in which men fly in to the party from all parts of the country US
The realtor nodded. “We did a fly-in togther once. Gamma Mu.” He tossed out the name like bait, Michael noticed, as if everyone had heard of the national gay millionaires’ fraternity. — Armistead Maupin, FurtherTalesoftheCity, p. 7, 1982