UNCTUOUS
- greasy (containing or resembling grease) [adj]
- (chiefly of minerals) Having a greasy or soapy feel
- (of a person) Excessively or ingratiatingly flattering; oily
- is a formal word used to describe someone who speaks and behaves in a way that is meant to seem friendly and polite but that is unpleasant because it is obviously not sincere.
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