cover one's ass

cover one's ass idiom
Also, cover one's hide or oneself. Make excuses or otherwise take action to avoid being blamed, punished, or harmed. For example, The first thing you learn in the army is to cover your ass, or Jane is ingenious at finding ways to cover her hide. The first phrase, considered vulgar slang, dates from the 1960s; the variants are more polite.

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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