terminally online

adjective2

1. •
   (informal) Spending an inordinate amount of time on the Internet.

   • SNL and other late-night outlets have fitfully tried to evolve by hiring social-media-trained talents and targeting some sketches toward the terminally online crowd. — 2023
2. •
   (informal) Characteristic of one who spends so much time online, to the extent of insane behaviour.