（常指为逗人笑）装疯卖傻，干蠢事，扮丑角
to behave in a silly way, often intentionally to make people laugh
Stop acting the fool, I'm trying to talk to you. 别再装疯卖傻了，我有话要跟你说。
He loves playing the fool.
I'm happy to play the fool if it makes my kids laugh.
He's made his name acting the fool.
I get the impression that he plays the fool a lot in class to make the other kids like him.
He's a bit old to be acting the fool, isn't he?
See also: fool noun