Top Definition
Whenever a computer is connected to the internet and a virus is installed. Causing havoc to everyone involved just like a sexually transmitted disease. Usually caused from a computer not having anti-virus software installed.
"Man I think my computer has a virus."
"Dude I told you that you would get an internet transmitted disease (ITD) from looking at all that damn porn!"
by mwood23 March 11, 2010

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