McLovin comes from Superbad, the 2007 comedy in which Fogell, played by Christopher Mintz-Plasse, uses a badly made fake ID bearing only the single name McLovin to try to buy alcohol. The absurd name and his total confidence in it made the character an instant breakout, and the line became a shorthand for adopting a false identity. It has since circulated widely in memes, reaction videos and short edits, where it still works because the reference is instantly recognisable and the joke needs no explanation.