Has several uses:
1. Same use as whooshka!! - declaration of joy.
2. Declared when you see a hot chick - misuse of this on a non-hot chick is sin.
3. Randomly shout this at somebody when you're in a drunken state to give them a shock and shitstir
2. *hot chick walks past* "ooshka!"
forbidden: *not so hot chick walks past* "ooshka!"
ooshka moderator: "no way man"
3. *random person walks past* "OOSHKA!!!"
stranger: "piss off"