1) ugly as stick - If someone is as ugly as a stick, they are very ugly indeed
2) under someone's heel - If you are under someone's heel, they have complete control over you
3) up a gum tree - If you're up a gum tree, you're in trouble or a big mess
4)off color - If someone looks off color, they look ill
5)Waiting in the wings - If someone is waiting in the wings, they are in the background, but nearby, ready to act on short notice
6)Walk a mile in my shoes - This idiom means that you should try