DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   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, tripper]
       3: a tourist who is visiting sights of interest [syn:
          sightseer, excursionist, tripper, rubberneck]
       4: a catch mechanism that acts as a switch; "the pressure
          activates the tripper and releases the water" [syn:
          tripper, trip]