1. (superl.) Offensively filthy; very dirty, foul, or defiled; disgusting; nauseous.

2. (superl.) Hence, loosely: Offensive; disagreeable; unpropitious; wet; drizzling; as, a nasty rain, day, sky.

3. (superl.) Characterized by obscenity; indecent; indelicate; gross; filthy.

Fescennine Rabelaisian abhorrent abominable abusive acute annoying arrant atrocious awful awkward bad bad-tempered baleful barfy base bawdy beastly below contempt beneath contempt bitchy black blameworthy blue boorish brackish brutal caddish cantankerous churlish cloying coarse contemptible crabbed cranky crappy critical crotchety crude cruel cussed dangerous deplorable despicable detestable difficult dire dirty disagreeable disgusting dreadful egregious enormous evil execrable fecal feculent fetid filthy flagrant flyblown forbidding foul foul-mouthed foul-spoken foul-tongued fulsome gloppy grievous gross grubby gunky harmful hateful heinous high horrible horrid icky ignoble ill-bred ill-natured ill-tempered improper impure inconsiderate indecent indecorous indelicate infamous iniquitous insensitive invidious irascible ithyphallic lamentable lewd licentious loathsome lousy loutish louty lurid maggoty malefic maleficent malevolent malicious malign malignant malodorous mawkish mean mephitic miasmal miasmic monstrous mucky nauseant nauseating nauseous nefarious noisome notorious noxious objectionable obnoxious obscene odious off color offensive ordurous ornery outrageous overripe painful pitiable pitiful poisonous pornographic puky putrid rancid rank raunchy rebarbative regrettable repellent reprehensible repugnant repulsive revolting ribald risque rotten rude sad salacious scabby scandalous scatological schlock scummy scurfy scurrile scurrilous scurvy serious severe shabby shameful shitty shocking shoddy sickening slabby slimy sloppy sloshy sludgy slushy smoking-room smutty soily sordid spiteful spoiled sposhy squalid stinking suggestive sultry surly tactless terrible too bad ugly unchaste unclean uncleanly unfeminine ungenteel ungentle ungentlemanly unladylike unpleasant unprintable unrefined unrepeatable unsavory unseemly unsolicitous untoward vicious vile villainous vomity vulgar weevily wicked woeful wormy worst worthless wretched yecchy yucky