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When someone has diagnosed their own disease by looking up the symptoms on the internet.
A: I've got brain cancer!

B: How do you know?

A: I have a headache and a lump on my foot! I looked it up on the interwebz and found out it means BRAIN CANCER!

B: Don't believe the Googledoctor, go to a real doctor.
by oldBuzzard March 28, 2010