Someone who really doesn't know how to act socially with other human beings.
It is the combination of the word autistic and goober, because that way, it sounds nicer.
Also referred to as moonpie and that one kid you are nice to only because you think they'd kill themselves if they had absolutely no friends and that one kid whose face would be broken if you weren't such a nice person.
Girl #1: And then after I asked him POLITELY to leave, he said he wondered if I liked the smell of fat Hawaiian men.
Girl #2: He did not! Did he?
Girl #1: Yeah! I know, right?
Girl #1: Oh my gosh, he is SUCH a moonpie.
Girl #2: I know, a real autogoober.