tripper

n. person or thing that trips; control lever or mechanism (Machinery); tourist, traveler (British); person who is under the influence of hallucinogenic drugs (Slang)

Tripper is a 2004 album by the Danish group Efterklang.
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n. gonorrhoea, sexually transmitted disease

(n.)
One who trips or supplants; also, one who walks or trips nimbly; a dancer.
  

(n.)
An excursionist.
  

Noun
1. (slang) someone who has taken a psychedelic drug and is undergoing hallucinations
(hypernym) drug user, substance abuser, user
(classification) slang
2. a walker or runner who trips and almost falls
(synonym) stumbler
(hypernym) pedestrian, walker, footer
(derivation) stumble, trip
3. a tourist who is visiting sights of interest
(synonym) sightseer, excursionist, rubberneck
(hypernym) tourist, tourer, holidaymaker
(derivation) travel, trip, jaunt
4. a catch mechanism that acts as a switch; "the pressure activates the tripper and releases the water"
(synonym) trip
(hypernym) catch, stop
(derivation) trip, actuate, trigger, activate, set off, spark off, spark, trigger off, touch off