all hat and no cattle
言行不一致，虛有其表
口語·形容虛張聲勢無實績
英文釋義
someone who talks boastfully or confidently about their abilities or accomplishments, but has no substance or evidence to support their claims
例句
He talks big about his business success, but he's all hat and no cattle—no real results to show.
典故來源
源于美國西部牛仔文化，戴大帽子象征牛仔身份，但無牛群則虛有其表。