Killer Karl is a fictional criminal and a minor character featured in the 2003 Grindhouse horror film House of 1000 Corpses. He was played by actor Chad Bannon.
Killer Karl was an inept robber who tried to hold up Captain Spaulding's Museum of Monsters and Madmen, along with his emotionally stunted friend Richard Wick. As Karl leveled a gun directly at Spaulding's nose, the Captain antagonized him, first by splaying his hands with his middle finger pointed up, then by shouting, "Fuck yo mama!", then "Fuck yo sister!", then "Fuck yo grandma!" Spaulding's sidekick, Ravelli, burst into the room behind karl and bludgeoned him across the back of the head with a sledgehammer. Spaulding finished him off by shooting him point-blank in the face while saying, "...but most of all, fuck you!".