光说不干,光打 雷不下雨
只说不做
请先来看一段对话：
A:Dave's going on about climbing Mount Everest again.He reckons he can do it with just two months' training,but he hasn't even been for a hike yet.
B:Yeah,the problem is he's all mouth and no trousers.
All mouth and no trousers就是“光说不做”.这个表达主要是英国人用,美国人会说blowhard/all talk,no action或者talk the talk but doesn't walk the walk.
我们还可以把这个表达说得更简单一些.可以说"你都是嘴" (you're all mouth).不过,这个表达最好是在朋友之间用用,不然陌生人会觉得你没礼貌.
