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Noun. A substance ingested to ease the process of intellectual masturbation and/or make beforementioned process more pleasurable. Substances include, but are not limited to: chocolate, alcohol, sugar, softdrinks, caffeine-drinks, high caloric meals, etc.
A: My pool of useless theories are running dry.

B: Here, have some booze and chocolate.

A: Sweet! Brainlube!
by PopeRuub May 01, 2010
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