What is unctious?

Being unctuous means to behave in a way that seems insincere or excessively flattering in order to gain praise or favor. People who are unctuous may use excessive or insincere praise to manipulate or control others, and may be seen as disingenuous or lacking in authenticity. They may also appear oily or greasy in their demeanor or physical appearance. The term unctuous has its roots in the Latin word unguentum, which means ointment or balm, and is often used to describe people who are self-serving or disingenuous in their interactions with others.