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"