lid
n.— «Eighteen minutes later, Samantha Tubman, the Obama staffer charged with corralling and shepherding the press pool, gave it “a lid.” That is, she conveyed the word from Mr. Obama, through his security detail, that he would not be going out any more that day, and the press was free to go.…“With no further scheduled events for the day, a lid was called until further notice. The President-elect decided to take the girls to a water park and we assembled the pool as quickly as possible.”» —“A Water Park, but No Pool” by Jackie Calmes in Honolulu, Hawaii New York Times: The Caucus Dec. 26, 2008. (source: Double-Tongued Dictionary)
Further reading
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If someone urges you to spill the tea, they probably don’t want you tipping over a hot beverage. Originally, the tea here was the letter T, as in “truth.” To spill the T means to “pass along truthful information.” Plus...