n. Any animal that sucks blood, as a leech, a mosquito, etc.n. A name of a common agamoid East Indian lizard, Calotes versicolor, perhaps so called from the reddish hue of the throat, as it does not suck blood.n. A cruel or bloodthirsty man; hence, one who sucks the blood of or preys upon another; an extortioner; a sponger.