Full box comes from Fortnite Battle Royale, released by Epic Games in 2017, where building walls, floors, ramps and roofs is central to fights. As competitive play developed, boxing an opponent became a core technique, and full box or full pieced described complete control of the surrounding pieces. Clips of the sequence spread through Twitch highlights, YouTube montages and TikTok edits, paired with the 200 pump shotgun finish. The phrase and its sounds became shorthand for a dominant play, so creators reuse the audio even outside the original match.