Abdul...these guys did an OK job sorta but your ol' Unca Joker will FULLY explain "Goober" so that you get a flavor for the historical significance, the genesis as it were, of Gooberism.
Back in the 1960's when America was still a country of rural towns connected by two lane routes, and before there were the massive highway systems you see in America today, there were towns and townships. Outside of the big cities, America was a maze of rural roads and two lane blacktops winding north and south, east and west all across the country.
Reflecting this state of being in the USA, there was a television show called the Andy Griffith Show...a portrayal of small town America and it's wholesome, down home values...here's a pic of Sheriff Andy Taylor and his ultra-nervous deputy, Barney Fife....
as the show progressed, another character was introduced...Gomer Pyle, the gas station attendent, whose main lines in the show were "Gollleeee!" and "Shazam!"....here's Barney and Gomer....
well, as time went by, Gomer got so big that they spun a show off the Andy Griffith Show called Gomer Pyle USMC, in which Gomer played a bungling Marine recruit whose main objective in life was to torture his drill sergeant, SGT. Carter....
this left a void on the Andy G Show , so they brought in another character, Gomer's even dumber cousin, Goober.Both Pyle cousins worked at Wally's Filling Station, though not together, and were the show's comic relief. Lindsey was hired to fill the void, when Gomer was spun off to join the United States Marine Corps. During season five, Goober was initially referred to as "Goober Beasley". To solidify the Gomer connection, his surname was changed to "Pyle". Thus was born into the lexicon the term Goober, which carries the connotation of being a dumb, crap kickin' country hick....here's the original Goober..
so there you go...NOW you got the WHOLE story....
p.s. found a link that's pretty comprehensive...yes, that little redhaired kid, Opie is Ron Howard, the actor and director...
http://www.timvp.com/andy.html