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/
"laugh on the other side of your face" picture
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