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2.
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 13, 2011
 
1.
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
 
3.
1. A word used to express excitement, appeal, agreement or satisfaction.

2. yes boy
"Dude, my parents are out of town, PARTY!" - "Yeahboi!"

"Yeahboi, that fat chic moved, now I don't have to look at her blubber!"
by milkymertz January 12, 2008
 
4.
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
 
5.
an exclamation with your mates when u get a hot girl's number
P1: so? what happened, did it work?
P2: Yeah Boi!!
by shizzle ma dozzle October 08, 2007