Beware the Chupacabra!
It totally sucks...
I'm reading Mario's book, THE NYMPHOS OF ROCKY FLATS, and I came across his chupacabra reference, too. But the term was being used as an affectionate nickname for a sexy chanteuse, I think, as in, "Sing 'Melancholy Baby,' you gorgeous blood-sucking goat-killer."
I like to use the word in the classical sense. The chupacabra is a fairly recent addition to the monster and demon family and, I think, unfairly ignored because of, yes, bias. While the European vampires flaunt their satin capes and fancy chateaus, the earnest chupacabra lurks around desolate desert towns and is all too often the victim of meth-addicted truck drivers speeding home from the bar so they can beat their wives.
Yes, the chupacabra is a third-class citizen of the monster world, dreaming of the night when parents will warn their children, "Brush your teeth or the chupacabra will come get you!"