Same word as coarse:

base, bawdy, blue, boorish, brutish, cheap, common, crass, crude, dirty, earthy, filthy, foul, foul-mouthed, gross, gruff, immodest, impolite, improper, impure, incult, indelicate, inelegant, loutish, low, lowbred, lowdown and dirty, mean, nasty, obscene, off-color, offensive, raffish, raunchy, raw, ribald, rough, roughneck, rude, scatological, smutty, tacky, uncivil, uncouth, uncultivated, uncultured, unrefined, vulgar, vulgarian