A combination of "bitch" and a "snatch"
Bitch + Snatch = Biznatch
Many high schoolers use the word to refrain from having to use the word "bitch" or "snatch" and get in trouble.
Ryan, why do you have to be such a little biznatch?
Sean, why do you have to be such a biznatch at times?
Telemantes, why do you have to be such a BITCH!?...I mean such a biznatch!?
So yea whats up biznatch? I MEAN BUDDY heh heh.