Meaning

noun a short mixed drink

noun an appetizer served as a first course at a meal

originEarly 17th century, from cock (“male bird”) + tail, in the sense “(a horse with its) tail standing up, like a cock’s”. The origin of the extension to “an alcoholic mixed drink” is unknown. One theory is that it refers to a stimulant (gingering), hence a stimulating drink; compare pick-me-up. Another attested use is for non-thoroughbred racehorses: these were considered "cock-tailed" due to their…

Etymology from Wiktionary, CC BY-SA 3.0