There are 2 results of your search for goober2.
goober1
A loser or target of ridicule: Urrr you're such a goober! [from US slang, from goober peanut]
Contributor's comments: Used in SA also (Adelaide).
goober2
Another word for a bogey, or piece of snot: Hey, you've got a big goober hanging from your nose! Also, gooby.