Adjective
big brain (comparative more big brain, superlative most big brain)
(Internet slang, often sarcastic) Very intelligent; genius.
PRODUCING food requires a BIG BRAIN. Source: Internet
Brain Training was the first of the derogatorily named ‘non-games’, titles that included the likes of Big Brain Academy and Nintendogs and which went on to become amongst the most successful video games of their generation. Source: Internet