knock-off (or knock off)

1. A very similar looking product copy a patented, trademarked, or copyrighted product or work that is cheaper as an illegal version. 2. A cheaper version of a higher-priced material or product as a competitor functionally and qualitatively equivalent.”

“Knock off”, Black’s Law Dictionary Free Online Dictionary 2nd ed., https://thelawdictionary.org/knock-off/