Synonyms:
brass_knucks, knucks, brass_knuckles, knuckles, knuckle_duster
Meaning: a small metal weapon; worn over the knuckles on the back of the hand
Usage examples
The coroner mounted the platform and rapped on a desk with his knuckles.
Then the princess knocked again, this time with her knuckles, and the voice came again, saying,
He rapped his knuckles again as he tried to pick it up. Then he stooped, picked it up himself, and with two strokes cut Buck's traces.
The typed superscription was noncommittal, but at the Berlin postmark his eyes narrowed and the knuckles of the hand by his side whitened.
It was as if youth and strength entered afresh into something already dead to sensibility and intention. As if by inspiration, she grasped the other's band with a force which blenched the knuckles.
'By Jove!' said Perker, taking both hands out of his pockets, and striking the knuckles of his right against the palm of his left, emphatically, 'those are the cleverest scamps I ever had anything to do with!'