boo

1. (US, Canada, African-American Vernacular, slang) A close acquaintance or significant other.Examples: "A tall, hooded young woman, clutching a newspaper article, delivered a note to the judge. “My name is Sunkist,” she wrote, “Lionel R. Harris is my boyfriend. Lewis shot my Boo and it was not self-defense . . . . Judge and jurors please listen to me I am 17 years of {age} and a good young lady and my Boo got killed for nothing.”"; "At night I think of you / I want to be your lady, maybe / If your game is on give me a call, boo / If your lovin' strong, gonna give my all to you"; "No matter what I do / All I think about is you / Even when I'm with my boo"CanadaUSslang

1. (slang) Cannabis.Examples: "[…] sexually promiscuous girl who smoked boo all day and socialized with junkies when she wasn't busy banging away in bed […]"; "Like I have smoked boo, drunk whiskey, and shot dope, and I was going through all three bags at once."; "Grandpa doesn't want Grandma and their kids and grandkids to know that he had to get penicillin shots all the time, or that he smoked boo (marijuana) on a daily basis, or that he dealt in the black market, or that he had yobos (purchased live-in sex slaves)."Synonyms: bhang, benj, boo, broccoli, bud, buddha, cannabis, cheebaslanguncountable

1. (now rare, Northern England, intransitive) To make a sound characteristic of cattle; to moo.Examples: "The cow's tether is put about the neck of the individual who has lost the cow, and he must go about booing like a cow till atonement is made."; "In the north of England people very often speak about the "oxen booing" (not lowing)"; "I remember being in the Great Nut Walk and hearing Old Nettle 'booing' like a cow outside ."Northern-Englandarchaicintransitive

1. (linguistics) The Boko language.