Top Definition
Similar to the McGangBang, the McTrain is a sandwich made by placing a McDonald's McChicken Sandwich inside of a Big Mac (between the middle bun and top patty).

When ordering, should be referred to as "Running McTrain" and is accompanied by a gesture where the one ordering moves their finger in a circular motion (similar to the gesture used to denote being crazy).

The McTrain was invented in Western Massachusetts and has since spread throughout New England.
We're running McTrain on this bitch.
by DirtyDogg April 26, 2009
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