brass knuckles

See synonyms for brass knuckles on
  1. a band of metal with four holes that fits over the upper fingers and that is gripped when a fist is made, used for increasing the effect of a blow with the fist.

Origin of brass knuckles

An Americanism dating back to 1850–55

Words Nearby brass knuckles Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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