secondhand grocery shopping

Doing all or part your grocery shopping by taking items from unattended carts. Usually done out of laziness, distance of the item, or tomfoolery.

Rob: Ugghh i forgot to get the eggs, and it's all the way on the other side of the store.

Matt: Don't worry, almost everyone has eggs in their cart.

Rob: Oh, good thinking. I'll just do some secondhand grocery shopping on some sucker's cart.

Matt: Quick, that cart's all alone with the goods!