Similar to a Brain Ninja, a Brain Pirate stays in someone's mind much longer, usually pillaging and taking over that person's thoughts. This can be used to describe women that you sometimes can't stop thinking about.
Mike: Dude, I can't stop thinking about Ashley.
Steve: Why? You like her?
Mike: I'm Freakin' in LOVE with her.
Steve: I don't blame you, that Ashley can be a HUGE Brain Pirate sometimes...
Steve: Why? You like her?
Mike: I'm Freakin' in LOVE with her.
Steve: I don't blame you, that Ashley can be a HUGE Brain Pirate sometimes...
by TraptInTheBurg December 6, 2008
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...
Guy 1: SHIVER ME TIMBERS!
Guy 2: Sound like someone has a case of Pirate Brain...
Guy 1: SHIVER ME TIMBERS!
by Exonence July 19, 2011