A general expression of surprise and delight, agreement, or enthusiasm, much used by awesomepeople in an either retro (as it is an old-fashioned phrase from the days of Merrie Englande) or sarcastic way. Also used to seal a gentleman's agreement between two awesome people.
Person A : Oh my God, How I Met Your Mother are doing a sixth season!
Person B : Huzzah!
Person A : Fetch your pitchforks. To the castle!
Persons B, C, D, E, F and G : Huzzah!
Person A : A gentleman's agreement!
*persons A and B shake hands)
Both : Huzzah!
An exclamation of joy. Not used as much as it should (it's so much fun to pronounce). Mostly used nowadays by Mr.Burns and other Matt Groening characters.
"Well huzzah, huzzah. I'll just throw back my legs and pollute my britches with delight."
-- Mr. Burns