Libelous

(a.) Containing or involving a libel; defamatory; containing that which exposes some person to public hatred, contempt, or ridicule; as, a libelous pamphlet.

Thesaurus Entries

abusive, back-biting, backbiting, belittling, bitchy, calumniatory, calumnious, catty, censorious, contemptuous, contumelious, debasing, defamatory, deprecatory, depreciative, depreciatory, derisive, derisory, derogative, derogatory, detracting, detractory, disparaging, invidious, malevolent, maligning, minimizing, pejorative, ridiculing, scandalous, scurrile, scurrilous, slanderous, slighting, vilifying, vituperative