Английский словарь американских идиом - bad trip

{n.}, {slang}, {also used colloquially} A disturbing or frightening experience, such as terrifying hallucinations, while under the influence of drugs; hence, by colloquial extension any bad experience in general. * /Why's John's face so distorted? - He had a bad trip./ * /How was your math exam? - Don't mention it; it was a bad trip./