marijuana, weed, dope
Boo is a term believed to have originated, or at least to have been popularized by, African-American jazz and pop musicians during World War II.
We smoked some boo. Song lyric from the 50's: "I sumokum booleyeaa, I smokum boo."
by Gunnter March 16, 2008

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Slang term for Marijuana hailing from the late sixties.
"This freak digs boo."
by DontReadThis January 01, 2006

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Used to call your friends this. Way different meaning than a babe or baby. Girls usually call each other this. If a girl call a guy this it doesn't mean anything, she's just being friendly.
Rosa: hi boo!
Eric: hi friend!
by jesssyyy.___ September 13, 2016

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Your boyfriend or girlfriend

Often used in the 2000's
I'm going to call my boo.
via giphy

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Boy or Girlfriend but just as annoying as the word Bae of the same meaning.
Gonna slap my Boo in the face.
by Rollerball April 06, 2015

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A boo is a girl/guy that can be there for you whenever you need them therefore you might even call your love one boo
Hey,"boo" how is it going.
by Wiley_Redcrane23 February 15, 2015

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Another way of saying "okay" "good"
Guy1: You want food bro?

Guy2: nah i'm boo.
by Giggin November 17, 2013

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