1. A name to call someone like a boy/girlfriend.
2. Someone you're interested in.
3. You're main guy/girl.
"I'm going out to dinner with my boo thing."
by Sixty Nine December 22, 2007
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Someone who is a close friend but you find them attractive enough to hangout, grab a bite to eat, grab a drink.
Hey boo thing, you tryna grab some lunch today and maybe a drink later on?
by UrbanIsTheBest July 14, 2018
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