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hit the deck

hit the deck idiom

Also, hit the dirt. Fall to the ground, usually for protection. For example, As the planes approached, we hit the deck, or We heard shooting and hit the dirt. In the early 1900s the first expression was nautical slang for “jump out of bed,” or “wake up,” and somewhat later, “get going.” The current meaning dates from the 1920s.

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.