Definition
To clench your hand into a fist and move it back and forth in the air, typically to express anger or a threat.
揮拳示威（表示憤怒）
He shook his fist at the sky in anger when he discovered his car had been scratched.
當他發現他的車被刮花時，他憤怒地對著天空揮舞拳頭。
The old man shook his fist at the children playing on the lawn, telling them to be quiet.
老人對著在草坪上玩耍的孩子們揮舞拳頭，叫他們安靜點。
During the game, the spectators began to shake their fists at the referee when he made a call against their team.
比賽期間，當裁判對他們的隊伍做出不利判決時，觀眾開始向裁判揮舞拳頭。