Top Definition
similar to a brain fart or zoning out, however your brain is filled with fluffy, cloudy, numbness. a light and fun term. During a brain fluffy you can not focus on anything.
Bill was sitting in History and was called upon..

Teacher "Bill who was the British Captain during the Boston Massacre"
Bill "Uh what?"
Girl in class "looks like he had another brain fluffy"
by name: email: age: October 07, 2010

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