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beat the pants off

Also, beat hollow. Win decisively over someone, outdo. For example, When it comes to the Patriots' Day parade, Lexington beats the pants off the neighboring towns, or This beer beats the other brands hollow. Both phrases use beat in the sense of “surpass.” Pants off has served as an intensifier since about 1930; the variant dates from about 1775.

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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.