當某人在胡鬧或裝小丑的時候你就可以用 clowning around 來形容。
Stop clowning around and put your coat on. We're going to be late!
I meant to do so much work today but ended up clowning around most of the day.
He was a terrible student - always clowning around in classes.
To fool someone 是另一個短語，意思是騙人，讓人相信一件不真實的事。
Example: I used to fool the bar staff and get served beer when I was only 16.