a motion-picture or television program that emphasizes gunplay, action, and often violence.
Origin of shoot-'em-up
First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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