hippogriff /ˈhɪpəɡɹɪf/ noun1 •a mythical beast, half griffin and half horse, supposedly the offspring of a griffin and a filly.To talk of being able to ride with stirrups, is trifling: get on Pegasus, bestride the hippogryph, or mount the white nag in the Revelation. — 1732 formshippogriffs