A "trumped up story" is a term used to describe a false or fabricated tale. It can have negative implications, such as deceiving others or causing harm. However, there are many other synonyms that can be used to describe this phrase, such as "fiction," "lie," "fabrication," "exaggeration," "myth," "invention," "tall tale," "fable," and "whopper." Each of these words may have a slightly different connotation, but they all refer to a story that is not based on fact or reality. When used in writing or conversation, these synonyms can provide a more descriptive and nuanced way of describing a "trumped up story".