to navigate through an overly crowded hallway by walking close behind a bigger person, or one that is able to get through the crowd easier.
Guy 1: Dang, looks like gym class just ended.
Guy 2: Yep. Good thing there's Carl. We can go hallway drafting off of him.
Carl: 'Scuse me..need a little room..
Guy 1: He really worked up a sweat :P.