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1.
The process by which a normal situation is made into a more homosexual one.

A bloke who meets his guy mates down the pub to watch football and get rowdy but ends up getting them to talk about feelings and give advice has successfully managed to gay the evening right up.

A girl who meets her girlie mates down the pub to talk about feelings and give advice but ends up getting them to watch football and get rowdy has just managed to gay the evening right the fuck up.
guy- "We're not going to the Red Lion, that's Rory's local. Last time we went in there, he had us giving him advice on jeans, remember? This is gonna be a good night, as long as we don't let anyone gay it up"

girl- "Is Julie coming? I don't want another evening gayed up because she wants to watch fuckin'shit utd play"
by MagickDio May 13, 2010
 
2.
The act of making a topic, person, or place seem homosexual.
Person 1:....So on our trip to Nashville we had to sit 4 guys in the back seat and boy was it crowded!

Person 2: Oooh, I bet YOU liked that!

Person 1: Gay it up!.. go on, what else ya got??
by DaveArrrrr April 22, 2008