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

1.
ponerse firme, plantarse
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.
Mis padres finalmente tuvieron que ponerse firmes y decirme que no podía ir a la fiesta.
•
The teacher had to put her foot down about the excessive talking in class.
La maestra tuvo que ponerse firme con las charlas excesivas en clase.