basically a goober is just a kindhearted, rather oblivious goofball. it's term of endearment really. it comes from the ancient
scottish verb "to goub", which has to do with doing a
dance and smiling sheepishly while doing so, exposing the goubs in
one's teeth.
"That John is such a goober," said Jane as John vector-danced* his Junior Prom away.
*footnote: the vector
dance involves angling
one's arms to form angles and vectors and pumping them back and forth to
music. basically, it's geeky as hell. but completely sexy.