Internet Addict 

Someone who is constantly on the internet on one or more of the following websites.
Twitter
Facebook
Youtube
Tumblr
Skype
etc.
If you're doing nothing, you're on one of these websites.

Friend: Whatcha doin?
Me: On tumblr looking at pictures of Youtubers... Oh and tweeting stuff on twitter... AND, and watching Cry play The Last Of Us on Youtube
Friend: Internet Addict much?
Me: YOU DON'T UNDERSTAND it's too many feels!

Internet Addict by an internet addict myself August 26, 2013

Internet Addict 

Someone who would go on a date and only talk to their date on a pda with wireless internet using a IM service.

Internet Addict by Fred November 7, 2003

Internet addiction 

Compulsory and excessive engagement in the internet such that it interferes with your IRL life.

The first thing I think about when I open my eyes in the morning is jacking into cyberspace and downlinking some bits, and I wake up at least three times a night to get my WiFix. I've tried canceling the DSL five times, but my Internet Service Pusher won't let me get clean. I don't think I'm ever going to kick this internet addiction.

Internet addiction by !Josh Cheek August 21, 2013

Internet Porn Addiction 

A form of addiction amongst straight/gay men of all ages which usually involves wanking over from video hosting websites like Spankwire, xHamster , xVideos etc.,it can also be in the form of voyeurism that involves webcam to webcam activity. To some extent, sick perverts would go as gross as watching Sluts eat their own shit and drink their own piss.

Internet Porn Addiction and Internet Addiction per se usually go hand in hand.

"Dude, I need to go to a marriage counselor or a Psychologist"

"Why?"

"Need to get rid of this Internet Porn Addiction, it could destroy my marriage"

Internet Porn Addiction by TT Boy4 April 11, 2010