The phrase frag out comes from military slang for throwing a fragmentation grenade, and it became a familiar teammate warning in first-person shooter games, where a short shout tells nearby players to take cover. Gameplay clips, streams and soundboards carried the line beyond matches, turning it into shorthand for any incoming explosion or surprise. It remains popular because it is instantly understood by gamers, needs no explanation, and sets up a payoff in only a second, making it easy to reuse across edits, memes and reaction videos.