word of the day, from wordsmith.org (Thanks Anu!)

"malkin (MO-kin, MAL-kin) noun 1. An untidy woman; a slattern. 2. A scarecrow or a grotesque effigy. 3. A mop made of a bundle or rags fastened to a stick. 4. A cat. 5. A hare.[From Middle English Malkyn (little Molly), diminutive ofthe name Maud or Molly/Mary.] A related word is grimalkin, referring to an old female cat or an ill-tempered old woman" (my italics).

-Anu Garg (garg wordsmith.org)

Hmm. Old female cat and ill-tempered old woman. Those both describe Pico.