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snake mackerel

American  

noun

  1. an elongate, deep-sea fish, Gempylus serpens, inhabiting tropical and temperate seas, having jutting jaws and strong teeth.

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.