This is probably a diminutive of Wampus Cat . One assumes this
is pronounced (Wompuss Cat) rather like the sound of amp in SWAMP.
May well reside in Swampy areas. it is supposedly a demonic cross
between a mountain Lion and an attractive woman, but with a Demonic
bent. Could also refer to any large or freakish cat- like the
attractive and rare Grey Tigers with white undersides, looking like
an enlarged conventional wild cat. Wampus Cat- I like the sound of
that!
My grandmother, who was raised in what is now the Great Smoky
Mountains National Park, always referred to the female genitalia as
a "wampus kitty."
My late grandfather, father, and uncles said a "wampus kitty"
was the absolute meanness animal in the world. They said it had two
mouths, one at both ends, and no way to go to the restroom! Which
was why it was so mean.