A brain twin is your cerebral soulmate. A person who shares the same ideology as you on a variety of subjects from music, books, and movies, to politics, art and culture.
A brain twin may be a close friend or someone you've never met, but whose work and opinions express that of your own.
"I was just thinking that!" or "I was just about to say that!" are common phrases used between brain twins.
OMIGOD. Your favorite TV show is 30 Rock and you read the Huffpo? We are totally brain twins.