This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A hollow-point small-arms bullet designed to expand upon impact, inflicting a gaping wound.

n. A bullet, with a soft nose, that expands upon impact to cause a gaping wound.

n. An ignorant person, an idiot

n. a soft-nosed small-arms bullet that expands when it hits a target and causes a gaping wound

"And even though some of what he thought about vampires had proved to be hopelessly wrong, a dumdum bullet to the face would stop anything for a while."

slug    bullet   

hadreal    small-calibre    teflon-coated    copper-jacketed    assassins'    jacketless    these    eight-and-forty    heavy-caliber    hypervelocity