Top Definition
Usually present at the early hours of the morning, When browsing the internet looking at random shit is more interesting than being asleep. No matter how hard this person tries to leave, they have to just finish browsing all 30 tabs open.
You look tired man.

Yeah internetsomnia totally took over last night, was up until 5am watching youtube videos of people falling over!
by A9k September 29, 2011

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