dum·dum
noun/ˈdʌmdʌm/
/ˈdʌmdʌm/
(also dumdum bullet)
- a bullet that spreads out and breaks into many pieces when it hits somebody
达姆弹（击入目标体内后爆开） Word Originlate 19th cent.: from Dum Dum, name of a town and arsenal near Calcutta, India, where such bullets were first produced.