"guy 1: "dude, how did you get to class so fast?" guy 2: "i did some crowd slipstreaming behind that tall guy over there, it saved me a lot of time
walking directly behind someone who is pushing through a crowd, to avoid having to push through the crowd yourself
""guy 1: "dude, how did you get to class so fast?" guy 2: "i did some crowd slipstreaming behind that tall guy over there, it saved me a lot of time" What is the definition of "crowd slipstreaming"?