clamp down on something

(verb) to stop something from happening in a very strict way

Example Sentences:

The boss plans to clamp down on us, because everyone always takes very long lunch breaks. In the future, lunch will only be 15 minutes long.

Teenager: Mom, I’m sorry I was late.
Mom: I don’t care. I’m clamping down on you now. You must be home by 9 p.m. each night.
Teenager: That’s so unfair!

The government clamped down on smoking by charging people $75.00 if a policeman found them with a cigarette.

From the News:

PM plans clampdown on drug-impaired driving

Media: