Activity where you're being a dirtylittle ratlooking for some cheese like gossiping and getting trashed. Rativities are for the hot girlies only. Rativities are always chaotic and about 50/50 chance of being regrettable.
Person 1: We we had some crazy rativities last night!
Person 2: Yea, I don't even remember everything, but my worst rativity was waking up in bed with my ex.