Used instead of the more vulgar bitch, for describing a really unpleasant woman,when your listeners include people ( like your Mom ) who would be appalled at such language. Acceptable in even the most curse averse groups.
That teacher is such a bee-I-zitch! She drives me crazy!
Chris - "zitch!!"
Lindsey - "whats a zitch?"
Chris - "a female peguin"
Lindsey - "oh i get it. kinda like bitch"
Chris - "yeah!"
Lindsey - "like man she is such a Zitch!"
Chris - "you got it!"