A disciplined mastery of Google search techniques. A googlefu master possesses many secret and awe-inspiring moves allowing him ultimate access to the most obscure data. Sometimes abbreviated as goo-fu.
My friend couldn't find jack shit online, but I applied the 'ol googlefu and showed him that those naked pictures of his girlfriend were still on the net.
Mastery of the Google Search engine, to answer any and all questions.
After incorrectly anwering a piece of trivia in a forum: "You're googlefu, it's just no good."