pronounced just as it sounds, referring to one's large penis. This term is not used for bragging rights or comparisons to John Holmes. By definition; longer and wider than a jumbo magic marker. anything smaller than that and all I have to tell you is, "sorry."
I'll take my donk-de-dong and give her a poke or two. or My donk-de-dong is so big I could bitch slap you with it from here.