Gazizza is a word from the world of "NewsRadio", a syndicated TV show on NBC from 1995-1999. The true
story of this word is a writer's brother's
friend, while playing foosball, would shout "Gazizza!" every time he hit the
ball.
However, in the NewsRadio world (Specifically in episodes "Office Feud," and "Space," it is used as an informal greeting.
See also "Bitchcakes", and "Internot!"