Flava flav's slogan. you can say it anytime.
boi=boy
"are we going to the clubs tonight?"
then you can say "YEAH BOI!"
Or
When you see a girl with a hot ass, you can also say
"YEAH BOI"
but you have to shout it out!!!!
by niggah skye June 12, 2006
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Flava Flav's Public Enemy catchphrase. It usually starts the shit, with Termanator X and Chuck D bringing it afterwards. However, anyone can say it, as long as you mean it. It is one of the most positive things you can say. It's the best.
Chuck D- Somebody in the house say yeah. If you really like to rock the funky beats, somebody in the house say HELL YEAH.
Flava Flav- YEEEEEEEEEEEEEEEEAH BOYYYYYYYY

or

Friend- You want to go get some tacos and tequila?
You- YEAH BOY
by Tyrannosaurus Rocks May 1, 2006
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when youre very excited or happy of something and the only way you can express yourself is by saying "Yeah Boi"
person 1: Do you want some mcdonalds?

Person 2: Yeah boi
by iluvdrayke October 12, 2017
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a sign of great awesome-ness, everything is good in the hood and no shit can change it, a moment that gives excitement to the user and/or people around
YEAH BOY! THAT AN AWESOME ASS

yeah boy! the vacation was filled with parties

oh shit you see the street fight? yeah boy!

she was dancing in the club and i was like yeah boy i gotta get that
by Huy N. Luu December 31, 2005
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To Enlighten people of you're Grand excitement or to show your dominance
ME:(walks into room with friends) YEAH BOI

Friends: OH SHIT!
by saltmaster April 14, 2011
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Flava flav's slogan. you can say it anytime.
boi=boy
"are we going to the clubs tonight?"
then you can say "YEAH BOI!"
Or
When you see a girl with a hot ass, you can also say
"YEAH BOI"
but you have to shout it out!!!!
by Skye June 12, 2006
Get the Yeah Boi mug.
Used to express certainty or willing to along with something without properly thinking it through. Often only used to respond to close friends, or rather your weirdo friends/homies. Frequently elongated when spoken e.g Yeahhh Boiii!
Dayna: Want to go see Bowling For Soup at Rock City next week?

Sarah: Yeah boi
by SpecBall February 23, 2018
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