put the brakes on
Meaning: If you put the brakes on something, you stop it or slow it down.
For example:
Origin: This metaphorical idiom is based on the fact that if you're driving a car and you "put the brakes on", the car slows down and stops.- Many companies are putting the brakes on new investment until the economy improves.
- The government has to put the brakes on the water treatment project until the corruption enquiry is over.