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(noun) Used to describe a person who is extremely loud and obnoxious. Also known as a nun in a church who is gay. The term 'gaynun' was formed back in 2003 and rhymed with the persons last name that was considered to be a 'gaynun'.
That guy is so loud and obnoxious, tell that gaynun to shut the hell up.

Kyle, stop being a gaynun.

You are a gaynun.
by BDM July 31, 2006
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