Kill or Be Killed may refer to:
Film and TV Kill or Be Killed (1942 film), British documentary short film Kill or Be Killed (1950 film), American film Kill or Be Killed (1966 film), Italian Spaghetti Western Kill or Be Killed (1976 film), South African martial arts film Kill or Be Killed (2015 film), American Western film "Kill or Be Killed" (The Vampire Diaries), 2010 episode of The Vampire Diaries "Kill or Be KIlled", an episode of Monsters: The Lyle and Erik Menendez Story
Music Kill or Be Killed (Biohazard album), 2003 Kill or Be Killed (Deniro Farrar and Shady Blaze album), 2012 "Kill or Be Killed" (song), song by Muse from their 2022 album Will of the People
Other Kill or Be Killed (comics), ongoing American comic book series that began in 2016 "KILL or BE KILLED", motto of Flowey, the main antagonist of the video game Undertale