Hayley教口语，“光打雷不下雨”用英语怎么说？

Full of talk that is more threatening or impressive than that which one can or will actually do.

说的比做的更具威胁性或更令人印象深刻

例：

He always threatens to call the police if I don't stay off his lawn, but he's all bark and no bite.

他总是威胁我说，如果我不离开他的草坪，他就叫警察，但是他就是光打雷不下雨。

John talks big about how much money he'll make someday, but he's all bark and no bite.

约翰吹牛说他总有一天会赚很多钱，但他只是说说而已。