- boosah
- 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.
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.)
Dictionary of american slang with examples. .