from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hollow-point small-arms bullet designed to expand upon impact, inflicting a gaping wound.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A bullet, with a soft nose, that expands upon impact to cause a gaping wound.
- n. An ignorant person, an idiot
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a soft-nosed small-arms bullet that expands when it hits a target and causes a gaping wound
After Dum Dum, a town of northeast India.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Dum Dum, a city in India where the type of bullet was developed, from Hindi दमदम (Damdam) (Bengali দমদম (Dômdôm)), from (damdama, "a raised mound or battery") (Wiktionary)
From the adjective dumb (Wiktionary)