Synonyms for Sleazy:

adj.

cheap (adjective)
cheesy, tawdry.
dirty (adjective)
grimy, untruthful.
disreputable (adjective)
broken-down, poor, common, seedy, squalid, shabby, shoddy, dilapidated, base, cheap, low, sordid, paltry.
vulgar (adjective)
broad, ignoble, clumsy, revolting, unseemly, idiomatic, coarse-grained, tawdry, repulsive, garish, common, indelicate, scandalous, crass, inelegant, glaring, chintzy, gaudy, sordid, barbaric, unbecoming, salty, vulgar, tasteless, graceless, unpolished, shameless, ignominious, animal, boorish, raw, homespun, outlandish, gross, crude, brutish, cockney, profane, rough, tactless, coarse, philistine, obscene, barnyard, undignified, rank, brazen, base, in bad taste, ill-bred, low, colloquial, offensive, rude, earthy, depraved, degraded, cheap, unrefined.

n.

cunning, fraudulent, devious, untruthful, dishonest, corrupt, unprincipled, deceitful, dubious, unscrupulous. down-at-heel, decrepit, shabby, ratty, faded, dingy, mangy, scrubby, rundown, shoddy, threadbare, bedraggled, tattered, better, broken-down, Decaying, dilapidated. good, miserable, schlocky, lousy, paltry, poor, rotten. shoddy (noun)
shabby, poor.
sleazy (noun)
disreputable, squalid, crummy, inferior, sordid, punk, cheesy, bum, tinny, thin, cheap, seamy, chintzy, seedy.

v.

dirty (verb)
filthy, contaminated, grimy, messy, unhygienic, grubby, unsanitary, unclean.

Other synonyms:

schlocky, down-at-heel, ratty. dingy, shabby, mangy, Decaying, poor, bedraggled, shoddy, faded, scrubby, tattered. decrepit, lousy, dilapidated, paltry. rundown, miserable. threadbare. rotten. broken-down. Other relevant words:
crummy, cheesy, grubby, schlocky, filthy, shoddy, inferior, punk, dingy, faded, decrepit, paltry, rotten, miserable, seamy, tattered, Decaying, scrubby, messy, threadbare, tinny, bedraggled, broken-down, seedy, down-at-heel, disreputable, rundown, shabby, ratty, mangy, squalid, thin, dilapidated, poor, grimy, bum, lousy.