We use the expression to clown around when we talk about someone playing tricks and making jokes.

VOA: special.2009.01.11

These numbers are so low they could be dismissed as people filling in the wrong things or making jokes or just being confused compared to-- stunningly superstitious high rankings.

这些比例低到,可以把它们当成人们填错表格,或者开玩笑，或者看不懂题目造成的误差,相比于…,那些高得吓人的比例。

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