Dictionary.com
Thesaurus.com
Synonyms

bad trip

American  

noun

Slang.
  1. a mentally or physically horrifying drug-taking experience, as one accompanied by nightmarish hallucinations or by physical pain.

  2. a dismayingly unpleasant experience.

    He was so ill-prepared that college was a bad trip for him.


bad trip Idioms  
  1. A frightening or otherwise very unpleasant experience, as in Given the poor turnout, her book tour was a bad trip. The term comes from drug slang of the mid-1900s, where it meant experiencing hallucinations, pain, or other terrible effects from taking a drug, especially LSD. It was then extended to any extremely unpleasant experience.


Etymology

Origin of bad trip

First recorded in 1965–70