high·er-up /ˌhaɪəˈrʌp, ˈhaɪəˌ/
  上級,上司,大人物
  high·er-up, n. A superior officer or official; a person having greater rank or station or quality than others; -- used chiefly in pl. [Slang]
  Syn: -- superior, superordinate.
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  higher-up
       n : one of greater rank or station or quality [syn: superior,
           superordinate] [ant: inferior]