short for "urinal copulator", this term refers to a man who is so insecure about the size of his penis (or about other men seeing his unit) that he stands absurdly close to the urinal while pissing. this gives any passer-by the impression that the man in question is actually trying to make sweet ceramic love to the urinal, rather than piss in it as normal males do.
dude, look at that urinal cop over there. i bet the splashback must be nasty. why doesn't he just back up a bit and arc it in?