What about the Hillman Minx   I dont see Minx as an adjective Its a noun Using it to describe a cat seems redundant shes a minx means something like shes catty I thought  a minx is some sort of fighting feline   The Hillman Minx car in the s was a very small automobile smaller than a Volkswagen beetle its name probably meant to suggest that it was sprightly and energetic despite its tiny size and low power I only know of it that our family owned two of them  a grey one with yellow earflaps and later a red one  the Minx could not go fast so its driver had to outwit other cars rather than overtaking them   Perhaps the minx relies more on wit and slyness than on physical strength