laugh on the other side of your face
US /læf ɑn ðə ˈʌðər saɪd əv jʊər feɪs/
UK /læf ɑn ðə ˈʌðər saɪd əv jʊər feɪs/

1.
笑不出来, 乐极生悲
to be upset or unhappy after having been pleased or confident, especially when something bad happens to you that you deserve
:
•
He was gloating about his win, but he'll be laughing on the other side of his face when he sees the penalty.
他还在为胜利沾沾自喜,但看到罚款时,他就会笑不出来了。
•
You might think it's funny now, but you'll be laughing on the other side of your face when you have to pay for the damages.
你现在可能觉得好笑,但当你不得不为损失买单时,你就会笑不出来了。