Dictionary
Words, grammatical forms and meanings linked to the ontology.
bourbon and branch en · NOUN
Meanings
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(US, abbreviation, alt-of, ellipsis) Ellipsis of bourbon and branch water, bourbon whiskey mixed with plain water.
At the Saratoga racetrack, the secret agent blends in with the thoroughbred set by drinking Old-Fashioneds and “Bourbon and Branch” (i.e., whiskey and water).
2009, Eric Felten, How's Your Drink?: Cocktails, Culture, and the Art of Drinking Well, Agate Publishing, →ISBN, page 39: