The “Longest Yeah Boi Ever” meme comes from a Vine by King Bach, one of the biggest creators of the Vine era. Origin In the clip, King Bach reacts to a hype moment and starts yelling “YEAH BOI—”, but instead of stopping, he keeps dragging it out for an absurdly long time while walking away. The scream stretches far beyond what anyone expects, which is the joke. The Vine cuts off before the yell even feels finished, making it even funnier. Why it became a meme The meme works because of: \t•\tdeli