internut

internut

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.
Farlex Dictionary of Idioms.

internut

n. someone devoted to or addicted to using the internet. He sits in front of the screen for hours. A real internut.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • big spender
  • be out of (one's) league
  • be out of somebody's league
  • accompany (one) on a/(one's) journey
  • accompany on a journey
  • (one) puts (one's) pants on one leg at a time
  • a stranger to (someone or something)
  • be in bad with (someone)
  • be (not) a patch on
  • a hard head