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.
顔が引きつる, 笑えなくなる
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.
彼は勝利を自慢していたが、罰則を見たら顔が引きつるだろう。
•
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.
今は面白いと思っているかもしれないが、損害賠償を払うことになったら顔が引きつるだろう。