non grata

adjective

1. not welcome: Reporters were non grata at the diplomatic reception.

noun, plural per·so·nae non gra·tae [per–soh-nahy nohn grah-tahy; English per-soh-nee non grah-tee, grey-, grat-ee] /pɛrˈsoʊ naɪ noʊn ˈgrɑ taɪ; English pərˈsoʊ ni nɒn ˈgrɑ ti, ˈgreɪ-, ˈgræt i/. Latin.

1. a person who is not welcome: He has become persona non grata in our club since his angry outburst.
2. a diplomatic representative unacceptable to an accrediting government.

noun plural personae non gratae (pɜːˈsəʊniː nɒn ˈɡrɑːtiː)

1. an unacceptable or unwelcome person
2. a diplomatic or consular officer who is not acceptable to the government or sovereign to whom he or she is accredited

A person who is no longer favored or welcome: “After my angry words with the manager, I am persona non grata at the video store.” From Latin, meaning “an unacceptable person.”