Said as a courtesy and warning to someone, alowing them to decide if they would rather have a bitch slap (palm of hand) or a pimp slap (back of hand) as punishment for their anoying behavior or disrespect.
Someone who pretends to be a pimp e.g walks and talks like a pimp but then turns out to be a complete bitch and talks about people and makes fun of other peope and when confronted deny all bitching claims and then pimp walks away.