Top Definition
When your brain is completely consumed by thoughts or pirates and pirating, often accompanied by thoughts of adventure and treasure-hunting. People with Pirate Brain can become obsessed, and even have constant dreams about pirates (or being one). It is often brought on by watching/reading large amounts of One Piece, or watching a Pirates of the Caribbean movie.
Guy 1: Man I had this dream last night where I was the best pirate in the world.
Guy 2: Sound like someone has a case of Pirate Brain...
by Exonence July 18, 2011

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