the.com/chuck wagon

means A mobile kitchen on wheels that followed cowboys on cattle drives, cooking and hauling food and gear across the range.

from From 'chuck,' old slang for food (possibly linked to 'chock,' meaning a solid lump, or to the butcher's term for a cut of meat), paired with 'wagon.' The device itself is credited to Charles Goodnight, a Texas rancher who in the 1860s retrofitted a sturdy Army surplus wagon with shelves, drawers, and a fold-down cooking surface so cowboys driving cattle across the open range could eat something besides trail dust. The name simply describes what it carried: chuck, in a wagon.