A dune buggy on the beach.
dune buggy definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a small, light automobile generally made from a standard, compact, rear-engine chassis and a prefabricated body, often made of fiberglass
Origin: so called because origin, originally equipped with wide, low-pressure tires for driving on sand dunes
dune buggy definition by American Heritage Dictionary
A recreational vehicle having oversize tires designed for use on sand dunes or beaches, especially a light vehicle with a modified engine mounted on an open chassis. Also called beach buggy.