I am currently reading my way through a long list of science fiction and fantasy titles. (http://www.npr.org/2011/08/07/138938145/science-fiction-and-fantasy-finalists if you are interested in the list).
****Wanda's Summer Festival of Reading Fluff****
1. Any creature whose existence has been suggested but not proven scientifically. Term officially coined by cryptozoologist John E. Wall in 1983.
2. That things that's getting ready to eat your head.
3. See also "monster."
Yup, this is fluff all right!