The wheel on a shopping cart that looks totally normal.....but when the trolley is loaded makes the whole thing uncontrollable.
Look that cart is motspurred
by Paul December 25, 2003
1 more definition
The pesky fourth wheel on a shopping cart that refuses to cooperate with the other three.
The motspur wobbled erratically as she pushed the cart down the aisle.
by McGluey July 31, 2008