keep the lid on something

keep the lid on something

or

put the lid on something

COMMON If you keep the lid on or put the lid on a situation or problem, you keep it hidden or control it to stop it becoming worse. Murray was desperately trying to keep the lid on a potential scandal. We want the public to assist us in putting a lid on crime.
See also: keep, lid, on, something

keep/put a/the ˈlid on something

try to make sure that people do not do something or find out about something: The government wants to keep the lid on discussion of tax reforms at the moment.
See also: keep, lid, on, put, something