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slang Alcohol, especially distilled liquor. Liquor him up with enough tongue oil, and John will tell you anything about his job you care to know. Tammy's normally very shy and introverted, but she'll talk your ear off after she's had a couple glasses of tongue oil.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
tongue oiland tongue loosener
n. liquor. She had a little too much tongue oil and was telling all about everybody. A little tongue loosener will help to break the ice.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.