What is unctuous?

"Unctuous" is an adjective that describes something that is excessively flattering or insincerely polite. It can also refer to something that is oily or greasy in texture or appearance. The word has negative connotations and is often used to describe a person who is overly ingratiating or manipulative. It can also be used to describe food or products that have a greasy or oily texture, such as certain moisturizers or sauces. Overall, "unctuous" is an adjective that implies a sense of insincerity or discomfort.