M.A.T. (Moose Area Transit) Rider: A large, overweight, or obese person riding on a scooter, moped, or otherwise motorized two wheeled vehicle. A term reserved for operators and passengers who's excessive girth prompts observers to perceive the vehicle as comically undersized, and incapable of bearing its present load.
That filthy disgusting Mat Rider is raping that poor Vespa's suspension.
A toddlers scooter will prove the perfect vehicle for exaggerating the already repugnant soup buckets that adorn a Mat Rider's mid-section, causing them to rupture and slosh out; spewing shameful visions of genetic refuse into our retinas, while simultaneously perpetuating the international embarrassment our nation suffers at the fat hands of the hogged-out.