put your foot down
US /pʊt jʊər fʊt daʊn/
UK /pʊt jʊər fʊt daʊn/

1.
bertindak tegas, menetapkan aturan
to use your authority to stop something happening
:
•
My parents finally had to put their foot down and tell me I couldn't go to the party.
Orang tua saya akhirnya harus bertindak tegas dan mengatakan bahwa saya tidak bisa pergi ke pesta.
•
The teacher had to put her foot down about the excessive talking in class.
Guru harus bertindak tegas mengenai obrolan yang berlebihan di kelas.