Top Definition
Someone whose sexual behaviour changes completely in a party or club environment; usually due to the influence of drugs and/or alcohol.
"Man, this morning was rough! I woke up completely hungover on a futon with twelve other people! It's even worse than last weekend!"

"You are such a partysexual!"
#partysex #partysexuality #gender #identity #monogamous (antonym)
by namehere9999 March 31, 2010
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