Answer:
What word in the English language does the following: The first two letters signify a male the first three letters signify a female the first four letters signify a great while the entire world signifies a great woman?
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
Crooked as a rainbow and slick as a plate ten thousand horses can't pull me straight.
I hold two meanings. With one I may be broken with the other I hold on.
What goes all around the world but never leaves its corner?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.