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flying squad

American  

noun

  1. a trained, mobile group of police officers, business executives, labor officials, or the like, capable of performing specialized tasks whenever or wherever sent, often for use in emergencies.


flying squad British  

noun

  1. a small group of police, soldiers, etc, ready to move into action quickly

"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

Etymology

Origin of flying squad

First recorded in 1925–30