Americans have always loved to eat and expressions relating to food--from New York's "big apple" to "wake up and smell the coffee" --pepper our everyday speech. But where did they all come from? For example, why is something that's as "easy as pie" considered "a piece of cake?" Or why do you "talk turkey" about quitting a bad habit "cold turkey?" And what does it really mean to "bring home the bacon"? The answers reveal the hidden history behind America's food and its secret slang.