A cook standing next to his chuck wagon.
chuck wagon 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 wagon, van, etc. equipped as a kitchen for feeding cowboys or other outdoor workers
Origin: chuck, plush wagon
chuck wagon definition by American Heritage Dictionary
A wagon equipped with food and cooking utensils, as on a ranch or in a lumber camp.