An oafish dimwitted goofball from a small town, usually from the Southern or Midwestern states, but can also be found in the American Southwest , Pacific Northwest and occasionally the more rural areas of New England. Similar to a hick but with more limited cognitive abilities (as hard to swallow as that might be). Goobers can have lovable characteristics, but that’s not always set in stone.
On the movie Deliverance the guys who sodomized Ned Beatty were hillbillies, while the retard with the banjo was simply a harmless goober.
Goober refers to drool, spit-up, boogers and other various forms of child slobber, particularly when those substances have come in contact with another person, such as a parent or sibling.