The act of having sexual intercourse with three other partners, which is not limited to the gender of the other partners.
Damn, those three bitches are sexy... Wonder if they're down for a quadie?
by Mr. Quad December 23, 2010
Can you define these popular missing words?
have sexual interactions with four people.
aye sexy girl wanna have a quadie with me and my friends?
by HHCD December 22, 2010