タガが外れる

タガがはずれる, たががはずれるtagagahazureru

expression · ichidan verb · intransitive

1. to become unrestrained and go to excess
2. to lose all restraint
3. to lose one's tension and become relaxed
4. to let go
5. to become disorderly
6. to be scattered
7. to lose one's self-control

Study it in Yanamino