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To bend at one's waist. OK, everyone, now bend over and touch your toes. I think I hurt my back when I bent over to pick up those boxes.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
[for someone] to bend down at the waist. I bent over and picked up the coin. When he bent over, something ripped.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.