Motspur
(n.) The fourth wheel of a supermarket trolley which looks identical to the other three but renders the trolley completely uncontrollable.
I was caught out by the motspur on my trolley and knocked over a baked beans pyramid at the shops yesterday.
Motspur
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.
motspur
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