cow killer

noun
  1. the wingless female of any of several velvet ants, especially Dasymutilla occidentalis, of the southern U.S., which inflicts a painful sting.

Origin of cow killer

An Americanism dating back to 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of cow killer