Answer:
Where do you go in through one hole and come out through two holes at the same time?
What is it which builds things up? Lays mountains low? Dries up lakes, and makes things grow? Cares not a whim about your passing? And is like few other things, because it is everlasting?
You throw me out when you want to use me and you take me in when you don't want to use me. Who am I?
A dragons tooth in a mortals hand, I kill, I maim, I divide the land.
My prefix is food. My suffix is rude. My infix comes in rounds. I keep you off the ground. What Am I?
hey are producers of pies and burgers and are great for tipping.