By non-solid, do you mean fluid or hollow? It’s certainly not fluid, since it’s maintaining its highly irregular shape due to the fact that it generates insufficient gravity to squash itself into an ellipse, like the Earth and its moon have done.
I’ll admit that I can’t tell whether your entire post is a joke.
http://solarsystem.nasa.gov/planets/profile.cfm?Object=Mar_Phobos
Phobos and Deimos appear to be composed of C-type rock, similar to blackish carbonaceous chondrite asteroids. Observations by Mars Global Surveyor indicate that the surface of this small body has been pounded into powder by eons of meteoroid impacts, some of which started landslides that left dark trails marking the steep slopes of giant craters.
http://www.space.com/20346-phobos-moon.html
The examination of Phobos and its companion revealed more than their odd, nonspherical shapes. The two moons are dark gray in color, and heavily cratered. The moons are some of the darkest, least reflective objects in the solar system.
After observing the pair, scientists concluded that they were made of material similar to Type I or II carbonaceous chondrites, the material that makes up asteroids and dwarf planets. The composition and odd shape led some scientists to conclude that Phobos and Deimos came from the asteroid belt, with Jupiter's gravity long ago nudging them into orbit around Mars.
More or less hollow. It’s orbit doesn’t work for a solid body the same size.