Boos-ah. To say something is excellent or to show that you did something good yourself. Origin: Carnarvon, WA, as far as I'm aware. Example: 1. Wow, that... um... roast potato was boosah. 2. Boosah! (When you've just whipped someone in Mortal Kombat 4, usually in combination with a hand gesture of your choice.)
BOOSAH (BOOS-AH)
Meaning of BOOSAH (BOOS-AH) in English
Slang English vocab. Английский сленговый словарь. 2012