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A person, group, or organization so powerful (either by size or by influence) that it does not need to heed the rules or threats of others. It refers to the riddle "Where does an 800-pound gorilla sit?" (Answer: "Wherever it likes.") Primarily heard in US. Don't mess with that guy; he's like an 800-pound gorilla! These big corporations act like 800-pound gorillas, making up the rules to suit themselves.
See also: gorilla
slang Phencyclidine (a recreational drug more commonly known as "PCP"). Were you guys able to score any gorilla biscuits before the concert?
slang Anabolic steroids. I bet some guys at the gym are taking gorilla juice.
slang Sedative drugs, often barbiturates. Gorilla pills are dangerous, man—I'd stay away from them.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
gorilla biscuitsand gorilla pills
n. amphetamines. (Drugs.) Stay away from gorilla biscuits. He’s high on gorilla pills.
See gorilla biscuits
n. steroids. (Bodybuilding. Steroids build muscle tissue rapidly.) Do all those muscle-bound creatures take gorilla juice?
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.