The term Goober Peas was made popular by a song that was sung during the American Civil War.

The song was about hard times in the south and how they survived by eating boiled peanuts known as Goober Peas. Boiled peanuts are still popular in the southern states but they are not called Goober Peas very often. Peanuts are grown mainly in the southern U.S. and for this reason they were a staple in the Confederate Army's diet.

More Info: en.wikipedia.org