To fuck the shit out of someone in the vagina, anus or mouth. This usually refers to a well endowed guy but can also describe a guy with an average to small penis that can just put it down adequately. It does not matter what gender one is male, female or tranny, anyone can get dickeddown.
Tyrone came by last night to dickdown a bitch accordingly. He know he can dick a bitch down anytime he so desires.