Top Definition
Everyone gets a kind of marijuana smoking device, preferably a different kind; ie. bong, pipe, joint, etc. Everyone takes a hit and passes to the left forming a non-stop train of smoke till the weed is gone.
Mark: Its 4/20, lets do a mary jane train!!!
(Mark precedes to pack 4 different kinds of pipes)
Mark: Everyone take a hit and pass to the left, lets get this choo choo rollin!
by MarkusMcNugen April 06, 2010

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