Definition
A stylized, softened spelling of “bitch” (common in AAVE/Southern slang) used as a casual address, insult, or emphatic exclamation, with tone ranging from playful to derogatory depending on context.
Examples
"Bih, you really snapped with that outfit."
"Get out my face, bih, you stay causing drama."
"Bih, it's hot as hell out here today!"