表达 “split one's sides” 用来描述某人 “捧腹大笑，笑破肚皮”。你也可以用它的形容词 “side-splitting” 来表达某件事情 “极为有趣，让人开怀大笑”。

例句

Did you see the stand-up comedy show on TV last night? It was so funny, I almost split my sides.

你昨天晚上看了电视上的那场单人喜剧表演了吗？太好笑了，差点笑破了我的肚皮。

She laughed so much that she nearly split her sides! It's sad, because I wasn't joking when I said I loved her!

她开怀大笑，差点笑破肚皮！真让人伤心，因为我说我爱她可不是在开玩笑！

He's so funny! He tells some side-splitting jokes!

他太逗了！他很会讲一些让人捧腹大笑的段子！