(Noun) The wheel on a shopping cart that is wobbly, squeaky (or otherwise noisy), off the ground (rendering it useless), or stuck.

This leads the individual pushing the cart to deeply regret choosing the cart, being at the store, and ultimately life itself.
News Story:
A local man was killed today when he was struck while trying to push a shopping cart across a busy intersection. Witnesses say the man inexplicably tried to guide the cart into the path of a bus, but was killed when his shoe lace became entangled in the cart's wheel, trapping him in the middle of the street.
A review of the cart's maintenance log suggests it may have possessed a squeaky wheel of regret.
by BlackjackII July 11, 2008
Get the Wheel of Regret mug.