The feeling of dazedness (usually accompanied with a headache) that you get when you use the computer for too long.
"Gah, I feel like crap! I've been on the computer too long so I have internet hangover!"
by Alice Vegetables March 24, 2009
When you wake up at 75 and realise you've wasted your entire life caring about other peoples problems, online!
by Dr. Tardlord May 06, 2016