Also found in: Medical.
slang The hallucinogenic drug mescaline, which is derived from peyote (a type of cactus). I think they're high on cactus buttons!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. peyote cactus containing mescaline. (Drugs.) Gert came back from vacation with a bag of cactus buttons.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.