indelicate

adjectives

in violation of good taste even verging on the indecent
"an indelicate remark"; "an off-color joke"
lacking propriety and good taste in manners and conduct
"indecorous behavior"
verging on the indecent
"an indelicate proposition"
is similar to
offensive to good taste especially in sexual matters
"an earthy but not indecent story"; "an indecent gesture"