A nay-sayer. A guy who is always negative and pessimistic.
-man England are shit at football
-stop being such a boo boy
by Hotandsveatyghee June 28, 2018
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When someone says something to you that you aren't trying to hear, or dont agree with. It can end a conversation, disagreement, or a stupid comment said by an associate of yours. its like saying "Gurl please"
Person 1: Gurl i heard you was gettin crunk at pjs party last week

Person 2: Gurl Boo u know know i dont even get down like that
by anonymous December 8, 2004
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when a boy has made a false comments you respond sayin "boy boo"
josh : i had sex with tasha

Tasha: boy boo!
by Xxx:: BAdd ::xxX April 28, 2010
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A "bromance" that has taken it one step too far. AKA you're boyfriend's boyfriend.
I think I'm going to hang out with my boy boo instead of my girlfriend, it sounds like fun.
by Canbre April 21, 2009
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