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your boo on the low. a girl u hook up with but dont want people to kno about.
Tom: that girl is beat
Brady: yea she is but id hit that she could b my boolow
by Dirters January 29, 2009
A girl (or guy) on the side.. whom you want nobody to know of..
Mayra- "that jawn Antonio is my boolow!"
by jawnington October 31, 2011