shoot-em-up
noun [ C ] informal (also shoot 'em up) uk/ˈʃuːt.əmˌʌp/ us/ˈʃuːt̬.əmˌʌp/
（充满暴力的）枪战片
a film that involves a lot of fighting with guns
"Revolver" is the latest Guy Ritchie shoot-em-up. 《左轮手枪》是盖伊 · 里奇最新的一部枪战片。
This is no conventional shoot-em-up western. 这不是传统的西部枪战片。
（主角可无限杀敌的）暴力电子游戏，打斗型电子游戏
a type of video game in which the aim is for a single character to kill as many enemies as possible
Sega's basic but hilarious shoot-em-up 世嘉公司出品的简单、搞笑的打斗型电子游戏