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back someone up

Slang definitions & phrases for back someone up

back someone up

verb phrase

  1. To confirm what someone says; support what someone does: If you want to go in to complain, I'll back you up (1860s+ British)
  2. To be someone's substitute; be in reserve: We've got three other drivers to back him up (1950s+)
  3. To play behind a fielder to retrieve balls that might be missed (1940s+ Baseball)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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