1) Cantankerous old woman 2) Fictional cat 3) Old female tabby 4) Old, unpleasant woman 1) Cat 2) Crone 3) Old bag 
A grimalkin (also called a greymalkin) is an old or evil-looking female cat. The term stems from `grey` (the color) plus `malkin`, an archaic term for a cat, derived from a hypocoristic form of the female name Maud. Scottish legend makes reference to the grimalkin as a faery cat that dwells in the highlands. The term/name may first come from B...
• (n.) An old cat, esp. a she-cat.
Seventeenth century term for a cat, especially an old female cat. 
Gri·mal'kin noun [ For graymalkin ; gray + malkin .] An old cat, esp. a she-cat. J. Philips.