Persona Non Grata

unpopular person, person who is not accepted

Persona non grata (Latin, plural: personae non gratae, also abbreviated PNG), literally meaning "an unwelcome person," is a term used in diplomacy with a specialised and legally defined meaning. The opposite of persona non grata is persona grata.
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Noun
1. a diplomat who is unacceptable to the government to which he is sent
(hypernym) diplomat, diplomatist
2. a person who for some reason is not wanted or welcome
(synonym) unwelcome person
(hypernym) person, individual, someone, somebody, mortal, human, soul
(hyponym) unpleasant person, disagreeable person

n. persona non grata

n. persona non grata