Kiss-asses is a derogatory slang term used to describe individuals who excessively flatter or fawn over those in positions of power or authority. There are several synonyms for this offensive term, including sycophant, brown-noser, toady, flatterer, apple-polisher, bootlicker, ass-kisser, crawler, and yes-man. These words are often used as insults to mock those who seem to have no integrity and are willing to do anything to gain favor or status, even if it means compromising their own principles or values. It's important to avoid using these terms in professional or personal settings, as they can be seen as disrespectful and unprofessional.