Definition of dumdum
(Entry 1 of 2)
: a bullet (such as one with a hollow point) that expands more than usual upon hitting an object
dum-dum
noun (2)Definition of dum-dum (Entry 2 of 2)
: a stupid person : dummy
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Merriam-Webster unabridged
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Time Traveler for dumdum
The first known use of dumdum was circa 1889
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