jenny-ass

Noun

 * 1) A female donkey.
 * 2) * c. 1849, G. Herbert Rodwell, Old London Bridge, London: Henry Lea, Chapter 15, p. 158,
 * this little donkey could not be trusted in the road, for it was always getting under the wheels, because it would not let its mother, a fine fat old jenny ass in the shafts, alone.