when a person often does a stereotyped gay thing to their sex, but isn't actually gay themselves.
he's into singstar, doesn't mind shopping and puts down the toilet seat. he isn't gay, just gay in theory.

"did jack just say he's getting into interior decorating?"
"don't worry about it... he's just gay in theory."
by Citronic January 28, 2009
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The theory that gay people in the United States enjoy living on this tips of peninsulas, which is quite possibly a subconscious phallic desire. For proof, look at three different cities: San Francisco, Provincetown, and Key West. All three are known for high percentages of gay residents, thriving gay tourism, and prominent gay pride parades; and all three are located at the tips of peninsulas.

Granted, Key West is technically part of an archipelago and not a peninsula, but US Route 1 connects the entire island chain to the mainland, so for practical intents and purposes, the keys form a peninsula.
No doubt uptight ignorant people will cry "homophobia" when they read this, but there is nothing offensive about gay peninsula theory.
by klopek007 March 14, 2010
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There is a theory that the BIG GAY is actually a virus that was released by the Gay Bomb created by the Crystal Queers back in WWII. The virus would make its host hallucinate, making the host think that the same gender is actually the opposite. But it doesnt make the host hallucinate a woman or man, it makes them hallucinate a hard to tell crossdresser also known as a trap. And because of this, it makes the host a Big Gay hence the virus being called the G-Virus aka the Gay-Virus. It is also known that the G-Virus makes the hand you use to masterbate the most and makes it into a fap hand sandwitch and it also makes it sentient. It also grows a large eyeball, acting as the arm's eyes to watch you sleep and masterbate.
ex:
Person 1: Bro have you ever heard about The Big Gay Theory?
Person 2: Isn't that a sho-
*Gay Bomb Explodes out of nowhere*
*The G-Virus infects both of them*
Person 1: Man is that a hot japanese school girl?
Person 2: Is that a hot japanese cheerleader?
Person 1: Lets have sex right now.
*removes trousers*
*sees pee pee*
Person 1: Its actually a boy and thats gay but its face looks like a girl so it doesnt make me gay!
*after long Big Gay sex*
*realizes they dont actually look like grills*
Person 1: Oh no I have space aids.
Person 2: Oh no I am the Big Gay.
by Faggottini Holocaust February 2, 2019
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