A term for a person, usually used in a roasting sense. Also used to address someone when they are being stupid or idiotic. But mainly to roast their stupid lookin' ass.
Person A: Hey we are out of milk
Mom: Why don't you get some
Person A: *is lazy as fuck* boi
Person A: Boi, why are you trying to kill yourself with a plastic fork in the outlet.
Person B: I cant afford metal
Person A: B-O-I
Person A: *sees a person on their phone while in class*
Person B: *does not pay attention in class*
-class ends-
Person B: Hey my dude, can I have the answers to-
Person A: BOI
Person A: *is talking to person B*
Person B: *looks away for one second*
Person A: *BREATHING INTENSIFIES* BOI
(Action) Usually accompanied with inhaling, exhaling, and the extending of both hands with the palms pressed together. This is usually used in astonishment, exasperation, and sarcasm.
I met Shrek over spring break and it was pretty great.
*inhales* *exhales* Boi, you have no idea how happy I am that you have met our onion-lord and savior.