Occurs when two men are in the act of anal sex and the receiving man has not taken a shit in a long time. As the giving man is pounding the other man in his long overdue shit, he pulls out to find a hair dangling from the tip of his penis with a small shit-crumb attached.
This does not have to occur in or around Denver.
Man 1- Did you hear that John gave Mark a Denver Dirty Dangler last night?
Man 2- Yeah, he had to take a shit right after they were done.