It's a derogatory slang word for a (specifically) white (usually single) women who lives off of welfare/food stamps/wic. With multiple biracial children.
The term comes origins come from the act of buying bread with a wic check.
When a fucking dumb bitch itβs talking sideways so you slap her in the tits ( specifically slapping down on the top of her tit, like a reverse burger flip, but harder and more hostile).