Source : Webster's Revised Unabridged Dictionary (1913)

Hinniate \Hin"ni*ate\, Hinny \Hin"ny\v. i. [L. hinnire.]
   To neigh; to whinny. [Obs.]

Hinny \Hin"ny\, n.; pl. {Hinnies}. [L. hinnus, cf. Gr. ?.]
   A hybrid between a stallion and an ass.

Hinny \Hin"ny\, n.
   A term of endearment; darling; -- corrupted from honey.
   [Prov. Eng.] --Wright.

Source : WordNet®

hinny
     n : sterile offspring of a male horse and a female donkey or ass
     [also: {hinnied}]