打口

1. • surplus (or "cut-out") stock from Western countries, sometimes marked with a notch in the disc or its case, sold cheaply in China (beginning in the 1990s), as well as Eastern Europe etc

     of CDs, videos etc

Character by character

• 打(dǎ)a semantically light, transitive verb that is combined with various grammatical objects to form compound verbs and verb-object phrases with a diverse range of meanings
• 口(kǒu)mouth