One of the mysteries of the English language finally explained.
1A tail that is conspicuous or carried high, especially that of a horse or (now more commonly) a deer.
2A deer with a flagtail; especially the white-tailed deer, Odocoileus virginianus.
3Any of several small fishes of the Indo-Pacific genus Kuhlia (family Kuhliidae), with silvery compressed bodies.
Mid 19th century; earliest use found in Journal Agriculture. From flag + tail.
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