See knuckle-duster for more knuckle·dust·erBrE /ˈnʌkldʌstə(r)/ 🔊NAmE /ˈnʌkldʌstər/ 🔊 noun (NAmE also ˌbrass ˈknuckles) a metal cover that is put on the fingers and used as a weapon 指节金属套（用作武器）