Top Definition
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
7 Words related to gay in theory

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