make a pig's ear意思是“把事情搞得很糟糕 ; 事情做得很糟糕”。

【例句】
Don't try to work when you're feeling ill. You‘ll make a pig’s ear of it.
身体不舒服的时候别尝试着工作，你会弄糟的。

I'm giving you one more chance, so don't make a pig's ear of it!
我再给你一次机会，这回你可别再搞砸了！