Top Definition
A vehicle used to for cascading the soil dunes of any central slash state (e.g Maryland). The rider is known to wear a fake fake-digital camo jumpsuit and be goofy at all times. For the vehicle to be considered a Yamaha Blumpkin, the rider must taking a shit at all times while on the vehicle.
"Yo dude that guy totally shredded while on his Yamaha Blumpkin today."

"Did you see that power ranger shred on that Yamaha Blumpkin?"
by Zordon19104 March 25, 2013
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