Any of a breed of large oversized women with bad hygene who call themselves "big boned". The breed tends to have a foul odor, wear out of date clothing, and dress in a proto-hippie manner. Typically feminist, will blame their lack of a relationship of weak minded men rather than their own fould odors or appearance. Most wildabeasts will deny being wildabeasts.
See also mare
I'll never go in the ladies room after that wildabeast has been in there again! The smell was enough to make me retch!