Definition from Wiktionary, the free dictionary
Alternative forms 
- A term of excitement and anticipation with military overtones.
- Let's go storm that hill. Booyah!
- The party on Saturday night is going to be awesome. Booyah!
- (colloquial) A term indicating satisfaction or accomplishment.
- Mission accomplished. Booyah!
booyah (plural booyahs)
- (colloquial) A thick soup of European origin made throughout the Upper Midwestern United States.
- I'd say it's a mixture of veggies, the stewing chickens and the long cooking time that are absolutely essential when you're talking REAL booyah flavor..