Don't be such a boobie, it's just a harmless joke.

别当傻瓜，这只是一个无害的玩笑。

Don't act like a boobie, you know better than that.

别像个傻瓜一样，你比这聪明。

He felt like a boobie after forgetting his own birthday.

他忘记了自己的生日后，感觉自己像个傻瓜。

She called him a boobie for not knowing how to use a smartphone.

她因为他不会用智能手机而叫他傻瓜。

Only a boobie would leave their keys in the car with the engine running.

只有傻瓜才会在发动机运转时把钥匙留在车里。