It's not funny! Someone could have been hurt.

这没什么好玩的！可能有人会受到伤害。

《牛津词典》

There's a reason why women don't read this stuff; it's not funny.

妇女们不读这种东西是有原因的：它并不逗趣。

《柯林斯英汉双解大词典》

The problem with the joke, of course, is that it's not funny.

当然，这个笑话的问题在于它并不好笑。

youdao

It's hard not to get caught up in this funny story. John Bevis tells a lot of tales this time of year when life slows down.

VOA: standard.2009.12.11

You sort of attack somebody and they're laughing but if it's--but if somebody's trying to mug you you're not "Ah, this is so funny."

你假装打对方，对方会觉得很好笑,但如果有人抢劫你时,你不会觉得好笑“

耶鲁公开课 - 心理学导论课程节选

It's when it's actually not funny to the audience around,

有时候对观众来说并不好笑，

街头表演很有趣 - SpeakingMax英语口语达人

But if you are uninsured and middle class, it's not funny.

NPR: 6 min 38 sec

Dr. THOMAS: And it's not funny for the frog.

NPR: Mole-Rats, Ants Making Science Headlines

It's not so funny that it has taken so long to reach this logical conclusion.

WSJ: 'Network Neutrality'? Never Mind.