two left feet字面意思两只左脚，可以引申为笨手笨脚。

【例句】
John's got two left feet when it comes to dancing.
约翰跳起舞来显得笨手笨脚的。

Don't take Tom with you next time. he's got two left feet.
下次别带汤姆了，他笨手笨脚的。