slang Alcohol, especially distilled liquor. Liquor him up with enough tongue loosener, 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 tongue looseners.
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See tongue oil
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.