The Oxford Thesaurus An A-Z Dictionary of Synonyms - nasty adj.

1) foul, filthy, dirty, unclean, offensive, disgusting, nauseating, revolting, horrible, loathsome, repugnant, repellent, vile, odious, obnoxious, objectionable, nauseous, sickening, vomit-provoking, fetid or foetid, noisome, mephitic, rank, malodorous, rancid, noxious: The nasty stench of rotting vegetation assailed our nostrils. 2) unpleasant, disagreeable, unsavoury, painful, objectionable, annoying, untoward, awkward, difficult, bad, serious: Lord Petherbridge had some very nasty experiences in the war. 3) obscene, dirty, pornographic, blue, smutty, lewd, vulgar, sordid, indecent, licentious, gross, coarse, crude, rude, ribald, bawdy, risqu‚, off colour, suggestive, Colloq X-rated, raunchy: The shops are selling some rather nasty videos that I don't want the children to watch. 4) unpleasant, disagreeable, ugly, bad-tempered, vicious, currish, surly, abusive, spiteful, irascible, ill-natured, ill-tempered, cruel, inconsiderate, rude, churlish, obnoxious, crotchety, curmudgeonly, cantankerous, crabbed, cranky, US and Canadian mean: Why is your father so nasty to everyone who wants to go out with you? 5 bad, severe, acute, painful, serious; dangerous, critical: I got a nasty shock when I opened the cupboard door. That's a nasty wound you have there.