The term "kissed ass" is a harsh and vulgar phrase used to describe someone who excessively flatters or is obsequious to gain favor or status with another person. There are various synonyms that can be used instead, which convey the same meaning but in a less offensive way. Examples include "sucked up," "buttered up," "brown-nosed," "boot-licked," "sycophanted," "crawled," "groveled," and "flattered shamelessly." Choosing a more neutral synonym can help you express yourself with greater tact and politeness, especially in professional or formal settings.