What is 429?
1.
429 ("Four-two-nine") — Gay. Spells G-A-Y on a phone. Used as a codeword by gay people. It's opposite, straight, is encrypted as "924" ("Nine-two-four").
"We've got a 429 at 10 o-clock!" , "Watch out, he is a 924!"
2.
of the homosexual nature; derived from dialing G-A-Y on a phone
That guy is totally 429, did you see the way he was dressed?
