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Webster 1828 Edition

, a.

Tasteless; having no taste. Job. 6.

Having a bad taste or smell.

Unpleasing; disgusting;

unsavory ‎(comparative more unsavory, superlative most unsavory) (American)

Not savory; without flavor.
Of bad taste; distasteful.
Making an activity undesirable.
Disreputable, not respectable, of questionable moral character.
His unsavory reputation as a mobster came back to haunt him when he ran for mayor of New York.

Nouns to which "unsavory" is often applied: reputation, character, aspect, element, practice, friend, tactics.

disreputable