Derradja is a word of arabic origin meaning a person assigned as an admin in an online community such as a Facebook Page or Group, with the main role of deleting and banning community members who go against the rules set by the admins and moderators in charge of that community.
A name for having just committed the act of butt sex.
Male #1: Hey, why are you applying Vaseline on your ass?
Male #2: I just did the derriere deed with you know who, I have a sensitive bunghole cut me some slack!