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Noun: speedrunning  'speed,rú-ning
  1. The practice of completing a video game or a segment of a video game as quickly as possible
    "Speedrunning has become a popular form of competitive gaming"
Verb: speedrun (speedrunned,speedrunning)  'speed,rún
  1. To play through a video game with the intention of completing it in the shortest possible time
    "He decided to speedrun the game after mastering all its mechanics"

Encyclopedia: Speedrunning

Speedrun