flag-waving

音标发音

Tens of thousands of flag-waving activists called for early elections.
数以万计挥舞着国旗的积极分子要求提早进行选举。
Oneof the things I have come to enjoy is the flag-waving leading up toAustralia Day.
其中一件令我享受的事情，就是澳大利亚国庆日的国旗飘扬。
When Phelps won his gold on Sunday morning, he received warm applauses from flag-waving compatriots and millions of Chinese audience who watched in the Water Cube or on TV.
在周日早上的比赛中，当菲尔普斯赢得金牌时，他不仅得到了挥舞着美国国旗的同胞的掌声，也赢得了水立方内和电视机旁观看比赛的亿万中国观众的热烈鼓掌。

Abdel Basset al-Megrahi received a warm welcome from flag waving Libyan supporters as he stepped off the plane Thursday in Tripoli, after his release from custody in Scotland on compassionate grounds.

Their latest grand idea—to create Franco-German industrial champions—has already been mocked as flag-waving interventionism.
ECONOMIST: Franco-German relations
Less compelling is his hint that a day could be set aside for flag-waving.
ECONOMIST: Britishness
Now analysts have started to lead the cheers, but their flag-waving does not hide some fundamental problems.
FORBES: Magazine Article

the strong expression of support for a country or group, sometimes with military intention

You can use flag-waving to refer to the expression of feelings for a country in a loud or exaggerated way, especially when you disapprove of this.