absent without leave

absent without leave idiom
Away without permission or explanation, as in Her daughter went to the mall but got in trouble for being absent without leave. The term and its acronym, AWOL, originated in the American military during World War I for soldiers absent from duty without permission (leave). It later was transferred to civilian situations, as in John didn't just cut his Tuesday classes; he went AWOL.

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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