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A mythological creature (usually humanoid and undead) said to feed on the blood or life energy of the living.
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(colloquial) A person with the medical condition Porphyria cutanea tarda, colloquially known as vampirism, with effects such as photosensitivity and brownish-red stained teeth.
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A blood-sucking bat; vampire bat (Desmodus rotundus)
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(figurative, derogatory) A person who drains one's time, energy, money, etc.
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(dated) A vamp: a seductive woman who exploits men.
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(US, slang) A medical technician who works with patients' blood.
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(US naval jargon) Synonym of anti-ship missile (ASM), particularly an incoming hostile one.