It means that youâre the son of a whore, a woman that has slept around a lot.
It can also be used towards a father with context, which would mean youâre the son of a man who is weak, or a pussy at heart. Another insult for this is âbitch madeâ meaning youâre raised by a bitch.
âYouâre moms a hoe, so that makes you a son of bitchâ
âYou bitch made, your dads a weak little pussy and youâre just like him you son of a bitch.â