trip·per /ˈtrɪpɚ/
 旅行者,遠足者
 Trip·per n.
 1. One who trips or supplants; also, one who walks or trips nimbly; a dancer.
 2. An excursionist.
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 tripper
      n 1: (slang) someone who has taken a psychedelic drug and is
           undergoing hallucinations
      2: a walker or runner who trips and almost falls [syn: stumbler]
      3: a tourist who is visiting sights of interest [syn: sightseer,
          excursionist, rubberneck]
      4: a catch mechanism that acts as a switch; "the pressure
         activates the tripper and releases the water" [syn: trip]