Top Definition
When you are playing zombies on "Ascension" in call of duty black ops,when all of your teammates die ,you go to the lander next to PHD and you run around in a circle while zombies are chasing you by the hundreds ,thus looking like a train.
dude i was playing ascension last night, and all of my teammates died so i had to make a mason train .
by mason gump May 12, 2011

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