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A humorous alternative to the words "I love you," due to the similar movements the lips create when spoken. My girlfriend and I decided we both weren't ready for the L word yet, so we started saying "olive juice" to each other as a kind of code word of infatuation. A: "Goodnight, sweetie. Olive juice!" B: "Olive juice, too, Mommy!"
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.