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Idioms and Phrases with leave flat

leave flat

Forsake or abandon completely, especially without warning. For example, He didn't tell her he wasn't picking her up; he just left her flat. [Colloquial; c. 1900] Also see high and dry; leave in the lurch.

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.