A derogatory reference to a person that's a real douche. A real cock. An overall prick who can only be equated to that of a sexual device shoved into one's rectum.
A sexual aid used to gap the rectum or to stimulate the rectal area or if deep enough, the male prostate.
> My boss is a real anal plug.
> Have you met the new guy in sales? A real anal plug.
> Carla got her bung nice and gapped using her anal plug.