Boi

A word used to EXPOSE someone, 1 to a larger number.

To 'Boi' someone, you simply just slap your arm with a straight hand pointing at the dumb guy, and shout "BOI!!!"

Friend 1 : Hey, you wanna go to the pool?
Me : It's closed?
Friend 1 : No, it's not!
Friend 2 : Yeah it is!!!
Me & Friend 2 : *boi arms activated* BOI!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!