Synonyms for Tripper (same or very similar meaning)
WordNet sense 1 (a walker or runner who trips and almost falls):
stumblerWordNet sense 2 (a tourist who is visiting sights of interest):
excursionist, rubberneck, sightseerWordNet sense 3 (a catch mechanism that acts as a switch):
tripFrom the ODE community, based on WordNetadd/edit