劣质 (liè zhì): shoddy; of poor quality

The sneakers sold by this online store were extremely cheap, but within less than a month of wearing them the soles came apart—a classic case of shoddy goods.

When renovating, never try to save money by buying shoddy electrical wiring; if it short-circuits and starts a fire, you'll lose far more than just money.

He bought a bottle of shoddy shampoo from a street stall, and after using it just twice his scalp had an allergic reaction—red and itchy—so he had to hurry to the hospital.

This batch of shoddy cement doesn't meet construction standards at all. If it were used to build apartment blocks, the consequences would be unimaginable, so the regulatory authorities immediately shut down the factory.

Mom always reminds me that those brightly colored shoddy toys sold by the roadside may well contain toxic substances, so never let young children play with them.