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rifled slug

American  

noun

  1. a shotgun projectile with helical grooves on its sides for imparting a spin to it when it is fired through the smooth bore of the shotgun.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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