come down hard on (someone or something)
1. To treat someone strictly or with severe reproach. I know I didn't do well on the exam, but I didn't expect my dad to come down so hard on me about it—he grounded me for a month!
2. To fall and land heavily on something, often a body part. Is she OK? She really came down hard on her knee.
come down hard on someone
in. to scold someone; to punish someone severely. Joe’s parents came down hard on him when they learned he had been suspended from school.