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cover one's tracks

Conceal one's whereabouts, activities, intentions, or the evidence of one's involvement. For example, No one knows much about where he's been—he's very good at covering his tracks. This term transfers hiding one's footprints to more general activities. [1870s] Also see cover up, def. 2.

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A bet is synonymous with a wager, but what does it mean in New York?
Often it means something is impossible.
It’s another way to agree with someone.
It serves as an apology.
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Words nearby cover one's tracks

cover letter, Coverley, covermount, cover note, cover one's ass, cover one's tracks, cover point, covers, coversed sine, cover-shoulder, cover slip
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.