let fall something

let (something) fall

To accidentally or inadvertently reveal some secret or important piece of information. I can't believe your sister let news of our engagement fall in front of your parents last night! The agent, under the influence of a powerful truth serum, let fall the names of other operatives working covertly in the area.
See also: fall, let
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

ˌlet ˈfall something

mention something in a conversation, by accident or as if by accident: She let fall a further heavy hint.
See also: fall, let, something
Farlex Partner Idioms Dictionary © Farlex 2017
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