Top Definition
Someone who is straight that 'crashes' on gay affairs. They think they understand gay people but are generally just annoying and are very often women that want the novelty of a gay best friend.
"hi mike, can i come out wth you and paul tonight?"
"you know we're going to a gay club right?"
"but you're straight"
"yes but i'm open. I'm not prejudice"
"no, you're just a gaycrasher"
by bennie5000 March 08, 2009
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