all bark and no bite
紙老虎，嘴上厲害但實(shí)際上沒什么能耐
口語(yǔ)·形容虛張聲勢(shì)的人
英文釋義
someone who talks tough or acts aggressively, but lacks the courage or ability to follow through with their threats or actions
例句
Don't worry about his threats; he's all bark and no bite, just like a yappy little dog.
典故來(lái)源
源自狗吠叫卻不咬人的現(xiàn)象，比喻人虛張聲勢(shì)而無(wú)實(shí)際行動(dòng)。