come down on
US /kʌm daʊn ɑn/
UK /kʌm daʊn ɑn/

1.
tomber dessus, sévir contre
to criticize or punish someone severely
:
•
The teacher will come down on you heavily if you don't finish your homework.
Le professeur va te tomber dessus lourdement si tu ne finis pas tes devoirs.
•
The government is expected to come down on tax evaders.
Le gouvernement devrait sévir contre les fraudeurs fiscaux.