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twelfth man

British  

noun

  1. a reserve player in a cricket team

  2. anything that is regarded as a contributory factor to the success of a football team, esp a large and vocal home support

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Twelfth man Christian Laettner will probably get a great view of all this talent mostly from the bench.

From Time Magazine Archive