like a bull in a china shop idiom
笨手笨脚的人;鲁莽闯祸的人
If someone is like a bull in a china shop, they are very careless in the way that they move or behave.
We told her it was a delicate situation but she went into the meeting like a bull in a china shop. 我们告诉她情况非常微妙，但她开会时还是冒冒失失的。