keep a lid on something
idiomPart oflid
keep a lid on something — idiom
1. to keep a situation under control and prevent it from getting worse; also used t
1.idiom
Definition
to keep a situation under control and prevent it from getting worse; also used to mean keeping something secret.
Example
The school managed to keep a lid on the bullying problem before the parents found out.
Ravindra tried to keep a lid on the surprise party plans until his sister's birthday.