A boi-o Is the condescending and/or patronizing way you refer to a Male or Boy when they're upto mischief, strictly to assert dominance in a passive aggressive tone.
Senior Male: "OI YOU GET BACK HERE WITH THAT LADIES PURSE BOI-O!"
Dweeb Teenager: "Get fucked ya cunt"
1. A thing u can say when a really hot girl walks by
2. When something good happens
3. When something great happens
1. "hi josh." "BOING BOING BLING BLING O YEA"
2. "yes, a B on a test, boing boing bling bling o yea!"
3. "BOING BOING BLING BLING O YEA, I WON THE NOBLE PEACE PRIZE!