persona non grata

1. PHRASE If someone becomes or is declared persona non grata, they become unwelcome or unacceptable because of something they have said or done. 不受歡迎的人

The government has declared the French ambassador persona non grata and ordered him to leave the country. 該政府已經宣佈法國大使爲不受歡迎的人，勒令其離境。