Same word as vituperous:

abusive, coarse, contumelious, defamatory, dirty, filthy, foul, gross, indecent, infamous, insulting, invective, lewd, low, nasty, obscene, offending, offensive, opprobrious, outrageous, raunchy, ribald, salacious, scabrous, scandalous, shameless, slanderous, smutty, truculent, vituperative, vituperatory, vituperous