lid

blow the lid off remove means of restraint and allow something to get out of control. informal

2013DVD Verdict Anyone looking for a documentary that blows the lid off the business of beauty isn't going to find it here.

flip your lid: seeflip.

keep a (or the) lid on

1 keep an emotion or process from going out of control.

2 keep something secret. informal

put the (or a) lid on put a stop to. informal

2013Motley Fool The firm has huge resources and the know-how to recover market share in the UK, and its withdrawal from the US should finally put a lid on its failure there and help it to concentrate its efforts back home.

put the (tin) lid on be the culmination of a series of acts or events that makes things unbearable. British informal

2005The Press (York) The Lancashire visitors made it 2–2 with seconds remaining. That put the tin lid on a frustrating afternoon for a much-changed York side who raced into an early lead through Fozzie Foster.

take (or lift) the lid off (or lift the lid on) reveal unwelcome secrets about. informal