tat

noun
🔊/tæt/
🔊/tæt/
[uncountable] (British English, informal)
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  1. goods that are cheap and of low quality劣质货 see also tit for tat
    Word Originmid 19th cent. (in the senses ‘rag’ and ‘person in rags’): probably a back-formation from tatty.