The line comes from Shrek, the 2001 DreamWorks animated film, where the ogre Shrek, voiced by Mike Myers, confronts fairy-tale creatures who have been banished to his swamp. The scene became one of the film's most quoted moments, and the phrase spread through memes, reaction videos and soundboards as shorthand for defending personal space. Its staying power comes from its simplicity: almost anyone can picture an unwanted visitor, making the line instantly understandable even without seeing the film.