Top Definition
A plutonic boo. This is a relationship between a man and woman most commonly, (also between two lesbians or two gay men) where in which the two parties are of equal or comparable attraction, but only see each others as friends with minimal sexual attraction and no sexual interaction. These are usually close friends who society would assume is a couple, but in fact are strictly functioning within a pluboo relationship.
Moo and Ali have so much in common and are both SMOKIN' HOT. I thought they would make a cute couple, but realized they make even better pluboos.
by themooman February 19, 2014
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