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zyzzyva

American  
[ziz-uh-vuh] / ˈzɪz ə və /

noun

  1. any of various South American weevils of the genus Zyzzyva, often destructive to plants.

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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.