When somebody does something stupid, or laugh at a stupid joke.
"Are you really gay if somebody touches you without you knowing"
"Boi"
Something to call your friends when they say something dumb.
"Boi, did you seriously just say that?"
When you don't know what to say because you know the other person is right
Anthony: Why are YOU awake is the question
Ireland: Boi
A word meaning, my dude, what you lack in intelligence, you make up for in stupidity.
"What's Obama's last name?" "BOI"
A term used more often than it should be, but we can not help that the fact that people are idiots. Anyway this term it used towards anyone who is being an idiot and deserves the hardest roast. Boi is best used with arm extended to the person being used on
Idiot: I should of asked for a refund on my haircut
Person: Boi, you should of got a refund on your outfit because you look like my grandmother when she gets out of bed