Top definition
Any man who is in a relationship with any amazing woman of Theta Nu Xi Multicultural Sorority, Inc. This man is devoted, loving, caring, etc. He will do anything and everything to be with an exquisite Theta Woman.
Man#1: "You datin' that girl from Theta Nu?"

Man#2: "Yeah, why?"

Man#1: "Dawg, you done turned into a Theta Boo!"
by thetaboo4life October 08, 2008
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