Sometimes distasteful, irritating, unpleasant, repugnant to the moral sense, lacking class/good taste/grace, uncouth, or disagreeable to some; but extremely amusing, interesting, humorous, or hilarious to most.
Person A is causing a ruckus and being outlandish in public.
Person B: "That guy sure is a mess, but it's really funny! What he's saying would surely be offensive if I actually cared."
A witty, well-written novel by John Grabowski that for some reason is called "EntertainingWesley Shaw" for some reason. Please note it's "Wel-sey," not "Wes-ley."