'Think fast, chucklenuts!' is one of the Scout's in-game voice lines from Valve's team shooter Team Fortress 2, released in 2007. The Scout, the game's fast-talking Boston mercenary, shouts it as a taunt when he gets the better of an enemy, which is why it fit meme edits so naturally. Fans ripped the line into soundboards and reaction compilations, where it became shorthand for a clever outplay or a well-timed juke. This page hosts the full version of the clip, and it stays popular because the delivery is short, cocky and instantly recognizable to anyone who has played the game.