a motion-picture or television program that emphasizes gunplay, action, and often violence.
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How to use shoot-'em-up in a sentence
He frightened the pirates away, when Case and I had planned to shoot em up!The River Motor Boat Boys on the Mississippi | Harry Gordon
British Dictionary definitions for shoot-'em-up
a type of computer game, the object of which is to shoot as many enemies, targets, etc, as possible
a fast-moving film involving many gunfights, battles, etc
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