cover one's tracks

cover one's tracks idiom
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.

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.

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