Someone who is really really smart but at the same time really really dumb. They suffer from severe confusion when encountering two people with the same name. A Pineapple Head loves video games and eating pineapples. He/She is not rude, but will occasionally make a poorly timed comment. Overall good guy, just suffers from being from Hawaii.
Wow dude way to be such a pineapple head."
"Wahh I'm hungry.
Typical Pineapple Head bullshit."