Someone who embarasses (themselves and) their country with
rude,
stupid, or inappropriate behaviour, particularly in the news or when travelling abroad. Can also refer to someone who is zealously patriotic; often a
politician or sports reporter.
Do you ever notice that the flagwarts always get tickets in the first three rows at the
olympics?
Only a flagwart would wear a USA jersey to a Brazil/
Argentina soccer match.
Did you see that flagwart on
CNN? He's so wrapped in the flag, it almost strangled him.