put your money where your mouth is指 “用你的行动而不仅仅是你的言语来证明你支持或相信某事”，就如汉语里说的 “说到做到，付诸行动”。

【例句】
He's always talking about helping the environment, but he now needs to put his money where his mouth is and take some action.
他一直说要保护环境，但现在他需要有所行动。

My boss often talks about providing training, but he needs to put his money where his mouth is and give us some.
我的老板经常说要给我们提供培训，但他得说到做到，给我们安排一些培训。