Top Definition
Cheating on someone or with someone, hooking up with your best friend's ex, a co-worker, or the person that your friends and/or family don't approve of would all be considered forbidden sex. I've had a few scrapes with this, but I should stick to fantasizing. Forbidden sex is forbidden because someone, somewhere, will be hurt.
i had forbidden sex with brad last night... and my parents are practicing Christians and brads mom is muslim
by NevaehheaveN June 10, 2014

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