wave the flag

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wave the flag

To stand up for, support, or defend someone or something. A number of people from the actor's hometown are arriving into New York to wave the flag at his debut performance on Broadway. My country is often a target for insults or gibes abroad, so whenever I go traveling I make a point of waving the flag for it.
See also: flag, wave

fly/show/wave the ˈflag

show your support for your country, an organization or an idea in order to encourage or persuade others to do the same: This exhibition of Scottish painting is our way of flying the flag. ▶ ˈflag-waving noun the expression of strong national feelings, especially in a way that people disapprove of
See also: flag, fly, show, wave