(n.) 1. one who lacks mental stability 2. a lack of mental stability, e.g. insanity 3. The portion of the skull enclosing the brain
1. "That braincase almost ran into me!" 2. "He must have a braincase if he's wearing those clothes." 3. In the car crash, Mike cracked his braincase, resulting in his death.
by Tim R. March 05, 2005
by Big Poppa Frost September 24, 2007