have a bee in your bonnet
成語所屬單字bee
have a bee in your bonnet — 慣用語
1. to keep thinking or talking about one idea because you believe it is very import
1.慣用語
釋義
對某事念念不忘；鑽牛角尖
to keep thinking or talking about one idea because you believe it is very important, often more important than it really is.
例句
Otis has a bee in his bonnet about cycling to work instead of driving.
Ever since the news report, Joshua has had a bee in his bonnet about food waste.