"Kiss-upped" is a slang term that means to excessively flatter someone in order to gain favor or to get something from them. Some synonyms for "kiss-upped" include "sucked up to," "brown-nosed," and "flattered." Other similar terms include "buttered up," "schmoozed," and "bootlicked." All of these phrases carry a negative connotation, implying that someone is being insincere or manipulative in their efforts to ingratiate themselves with someone else. While it's certainly possible to compliment others without being manipulative, the act of "kiss-upping" implies an ulterior motive that may not be well received.