throwaway - definition and synonyms

adjective 

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/ˈθrəʊəˌweɪ/
  1. 1
    a throwaway product has been made to be used for a short time only and then thrown away. A more usual word is disposable.
    1. a.
      used about societies, activities etc in which people use a lot of throwaway objects

      the modern throwaway society we live in

  2. 2
    a throwaway remark, comment etc is something that you say suddenly and without thinking carefully about it