Basically what it says on the tin, I'm writing a fantasy world and I'm testing some exotic types of moons for this one. Then I came across Haumea, a dwarf planet located beyond Neptune.
This is faster than any other known equilibrium body in the Solar System, and in fact faster than any other known body over 100 km in diameter.  While most rotating bodies in equilibrium flatten into oblate spheroids, Haumea rotates so rapidly that it distorts into a triaxial ellipsoid. If Haumea spun much faster, it would distort into a dumbbell shape and split in two.  This rapid rotation is believed to have been caused by the impact that created its satellites and its family of collisions. 
Haumea is a triaxial ellipsoid, which means that all cross sections are ellipses and not circles. So hypothetically speaking, if a planet like earth had a moon shaped like Haumea, what would it look like from the planet? (Obviously this moon will have a similar rotation to that of Haumea to keep its shape.)
Ignore the moons and the ring around Haumea, I mean only its shape