From Head to Toe, 41

Head to Toe:

Boning Up on the Bones of the Body

Hip (b): ischium

The ischium’s the lowest part—

And back part of the hip.

It is a part that you could strike

If you were, oh, to slip!

Or if some creepy guy (like me)

Would trip you—just for fun.

I fear that is the kind of thing

That—long ago!—I’ve done!