The 'KHAN!' meme originates from the 1982 science fiction film 'Star Trek II: The Wrath of Khan,' specifically the scene where Captain James T. Kirk, played by William Shatner, lets out a guttural, prolonged scream after being marooned on an asteroid by his nemesis, Khan Noonien Singh. While intended to be a moment of intense drama and desperation, Shatner's over-the-top performance eventually became a staple of internet humor, symbolizing extreme, often melodramatic, frustration. Online, the meme is frequently used to vent about everyday annoyances or to parody moments of cinematic over-acting, usually accompanied by several extra N's and exclamation points to emphasize the intensity of the yell.