WordNet sense 1 (offensive to the mind):

abhorrent, detestable, repugnant, repulsive

WordNet sense 2 (unpleasant or disgusting especially to the senses):

offensive

WordNet sense 3 (offensive to good taste especially in sexual matters):

indecent

WordNet sense 4 (suggestive of or tending to moral looseness):

lewd, raunchy, salacious

WordNet sense 5 ((of behavior or especially language) characterized by obscenity or indecency):

dirty