imaginary animal, coined 1876 by Lewis Carroll in "The Hunting of the Snark." In 1950s, name of a type of U.S. cruise missile, and in 1980s, of a type of sailboat. Meaning "caustic, opinionated, and critical rhetoric" is from c. 2002, probably from snarky and not directly related, if at all, to Lewis Carroll's use of snark.
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