If so: Make a new bookmark (preferably in your Bookmarks bar) and call it Full screen (or just [F] as mine is called), then edit the address/location to:
You can drag a window from the bottom right corner. However, I take it your a recent switcher and unlike windows, OS X isn't really meant to do such things. I see this partially because it's such a good OS for multi tasking. I'm sure it's something you'll grow use to over time.