dirty dog

Noun dirty dog has 1 sense

• dirty dog(n = noun.person) bum, crumb, git, lowlife, puke, rat, rotter, scum bag, skunk, so-and-so, stinker, stinkpot - a person who is deemed to be despicable or contemptible; "only a rotter would do that"; "kill the rat"; "throw the bum out"; "you cowardly little pukes!"; "the British call a contemptible person a `git'"
is a kind of disagreeable person, unpleasant person