The line comes from Friday, the 1995 comedy starring Ice Cube and Chris Tucker, where Deebo is the neighborhood bully played by Tom Tiny Lister Jr. His confrontational catchphrases became quotable long after the film left cinemas, passed around in hip hop culture, reaction videos and soundboard collections. Why you trippin survived because it works outside the scene, as a quick way to call someone out for overreacting while keeping the joke in Deebo's unmistakable menace.