A cheaper or lower quality version of a product, typically one that is made to look similar to the original but without permission or authorization.
From the phrase knock off, which means to make a copy of something, usually in a cheaper or lower quality manner.
- He bought a knockoff of the designer handbag.
- The knockoff of the famous painting was difficult to tell apart from the original.
- The knockoff watch looked almost identical to the real one, but it was much cheaper.
- The knockoff shoes were made of cheaper materials and didn't last as long.
- He was caught selling knockoff designer merchandise in his store.