on a trip

on a trip

slang In a drug-induced state, often one resulting from the ingestion of psychedelic drugs such as lysergic acid diethylamide (LSD, or "acid"). Ken's acting so weird, like he's on a trip or something. Did he take anything with you guys? Good luck having a normal conversation with someone who's on a trip.
See also: on, trip
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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