slang Someone who spends a lot of time online. A pun on "Internet" and "nut," which can be used as a term for someone who is overly or obsessively interested in or devoted to something. The kids were total internuts back when we first got America Online—it took longer for my wife and I to embrace it.
internut
n. someone devoted to or addicted to using the internet. He sits in front of the screen for hours. A real internut.