A computer crack head is a person that spends an insane amount of time using the computer, being mentally seperated from the outside world.
People who play retarted online games for long periods of time.

Angela: Nick you've been on the computer for 8 hours straight. Go brush your teeth, and take a shower!

Nick: I'm not finished yet! I have to kill this dragon, and collect fairy dust.

Angela: Nick, your a computer crackhead.
by Cewt Pickle for a Nickle July 22, 2009
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