trifling heifer
A female cow or "trifling heifer" who goes around claiming they don't have "MAD COW DISEASE"- over and over again and agian - while the major symptoms are pianfuly obvious and visible.
"trifling heifer": "I don't have mad cow disease for the simple fact that I am not a Cow!!-I am acually a helicopter, and if anyone come out into this field to "put me down" or kill me saying i am diseased I will simply fly away." 