Aka a "floor rat", someone who spent most of the 90s-00s
working on one of the Chicago trading floors before trading was moved to
electronic markets.
Spizzes usually have raw vocal cords from years of screaming in the pits and a permanent neck twitch caused by constantly having to adjust their jacket collar.
The uniform of a typical spizz is a CME floor clerk's jacket, flannel shirt, and
black jeans.