to be all talk (and no action)
01
口だけで行動なし, 口先だけ
used to describe someone who continuously talks about what they are planning to do, but they never do or achieve much
![to [be] all talk (and no action|) definition and meaning](https://cdn.langeek.co/photo/42262/original/?type=jpeg "to [be] all talk (and no action|) definition and meaning")
disapproving
idiom
例
He talks a big game about starting his own business, but so far, he's all talk and no action.
彼は口だけで、約束を果たさない。
