plow under

plow under idiom
Cause to vanish, overwhelm, as in The independent bookstores are being plowed under by the large chains. This term alludes to the farmer's burying vegetation by turning it into the soil with a plow. [Second half of 1900s]

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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