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1.
A person who is really smart, and everyone asks them for help with things they don't understand. The person has extensive knowledge of many different subjects.
Guy 1: "I think I put the right answer for #3 on that test"

Guy 2: "Well I put A."

Guy 1: "I put B. Wish I knew if that was right."

Guy 2: "Lets go ask Mike, he has a google brain."
by Tex-Mex Shawn C. September 22, 2010
 
2.
a person who seems capable of answering any question
I needed the title of a book, so I asked my favorite googleBrain about it by topic and abstract
by Arial Lancaster September 05, 2007