crud

1 foul matter that mars the purity or cleanliness of something you must have stepped in something, because there's crud all over your shoe Synonyms filth, dirt, grime, gunk, muck, smut, soilRelated Words scum, sewage, sewerage, slime, sludge, swill; dross, dust [British], garbage, junk, litter, refuse, rubbish, scrap, trash, waste; crock [dialect], soot; dinginess, dirtiness, dustiness, filthiness, foulness, griminess, grubbiness, nastiness, squalidness, uncleanliness, uncleannessNear Antonyms cleanliness, cleanness

2 slang  a person whose behavior is offensive to others I don't care how hip that clothing store is, their employees behave like absolute cruds Synonyms bastard, beast, bleeder [British], blighter [chiefly British], boor, bounder, bugger, buzzard, cad, chuff, churl, clown, creep, cretin, jerk [slang], crumb [slang], cur, dirtbag [slang], dog, fink, heel, hound, joker, louse, lout, pill, rat, rat fink, reptile, rotter, schmuck [slang], scum, scumbag [slang], scuzzball [slang], skunk, sleaze, sleazebag [slang], sleazeball [slang], slime, slimeball [slang], slob, snake, so-and-so, sod [chiefly British], stinkard, stinker, swine, toad, varmint, verminRelated Words barbarian, brute, caveman, Neanderthal, savage; loudmouth, vulgarian; lowlife, miscreant, rascal, rogue, roughneck, scab, scamp, scoundrel, villain, wretch; booby, doofus [slang], fool, jackass, nincompoop, ninny, nit [chiefly British], nitwit, nut, schmo (or schmoe) [slang]; airhead, birdbrain, blockhead, dink [slang], dolt, dope, dork [slang], goon, half-wit, idiot, imbecile, moron, turkey; brat, insolent, nuisance, pest, snip; snob, snoot, snot; dweeb [slang], nerdNear Antonyms hero, heroine, idol, role model; gentleman, lady; angel, saint