1)
A party where everything is blue. The lights are blue, the food is blue, all of the beverages must have the word blue in the brand names. Everyone at the party must be wearing blue or they must go topless. (this applys to all sexes)

2)
a sex party
We Need Girlfriends Episode 2: the Blue Party
by Syd and Sam April 15, 2008
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Blue People's Party. Undoubtably the strongest imaginary... err I mean real political party ever. Praise the hat.
"Did you join the Blue People's party?"

"No, I'm green"
by CoolCrafter September 3, 2021
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