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let daylight through

let daylight through idiom

or into

Shoot or stab a person, especially fatally. For example, Stick up your hands or I'll let daylight through you. This idiom alludes to making a hole in someone's body. [Slang; early 1700s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.