Literally "not savory", but depending on
context, it can
convey a wide range of
disdainful attitudes.
Speaking with a hint of mild horror casts unsavory at its least strident. The addition of looking down one's nose at the same time conveys a middling degree of disdain. Combining a sour expression with lips slightly trembling in loathing invokes unsavory at its most intense.
Be cautious when evaluating this word, especially if it is levelled at you personally. Most users are inexpert at deploying it accurately, and can apply too heavy a hand, rendering these metrics almost useless.