Ever heard someone described as 'persona non grata'? It sounds rather dramatic, doesn't it? Well, it essentially means 'an unwelcome person'. It's a term, often used in diplomatic circles, to declare someone unacceptable or undesirable in a particular country.
Think of it as being officially blacklisted. While it's most frequently associated with diplomats who've overstepped their boundaries (spying, interfering in internal affairs, etc.), the term can be used more broadly. You might jokingly declare someone 'persona non grata' at your next game night if they keep cheating!
Diplomatically speaking, being declared persona non grata can lead to expulsion from the country. It's a serious move, indicating a severe breakdown in relations. So, while it might be fun to use casually, remember its serious implications on the international stage. Now you know what it means when you're officially uninvited!