To act in a homosexual manner when one's (supposed) sexuality is heterosexual. Not quite the same meaning as to "turn gay", but almost.
Dude A: "Dude, what's the deal? I wake up and find you sleeping in my bed! Why don't you sleep in your own? I hope you're not startin' to fag-out on me!"
Dude B: "Don't worry about it, man. It'll only happen once-in-awhile —usually after I suck your cock, like I did last night. And thanks for being cool enough to pretend to be asleep!"
Dude B: "Don't worry about it, man. It'll only happen once-in-awhile —usually after I suck your cock, like I did last night. And thanks for being cool enough to pretend to be asleep!"
by wordbird July 2, 2006

Andre: My goodness those Levi's fit you very nicely. We should hang out some night with my friends.
Roger: No thanks.
Andre: Why not ?
Roger: I'm not going to fag out. Girls are my thing. Get lost.
Roger: No thanks.
Andre: Why not ?
Roger: I'm not going to fag out. Girls are my thing. Get lost.
by cut the cards February 9, 2023

by Sgt. Mcpootle July 24, 2006

You intend to meet someone for a drink, they email you the day before to tell you they can't make it for some reason or other - they have fagged out.
by Sexteta December 19, 2008

when a guy chooses hanging out with his girlfriend over hanging out with his true friends cause he wants the nookie.
by colin powell November 17, 2004

I wanted to testify to state my case because I feel I'm completely in the right, but my public defender decided to fag out and now i have to take 6 months of anger management and drug abuse classes at city hall.
by Phil E. Drifter February 10, 2007

by Sundin July 17, 2006
