Top Definition
An expression of excitement.

When one is really happy about something they often zaaaa, the more a's used the more the excitement.
Tim: Hey Joe, did you hear about the new xbox360?!
Joe: Uhh... that came out like 6 months ago you moron.
Tim: It did? Oh well I'm getting one on Sunday omgomg Zaaaa!
by Lauren & Johno July 18, 2006

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