(science fiction) A hypothetical megastructure of immense computational capacity powered by a Dyson sphere.

Empty-headed; foolish.

A largely discredited model of the brain according to which the reptilian complex, the paleomammalian complex (limbic system), and the neomammalian complex (neocortex) are each independently conscious, as structures sequentially added to the forebrain during the course of evolution.

(dated) A computer.

(Internet slang, often sarcastic) Very intelligent; genius.

(neuroscience) The use of various techniques to image the structure and function of the nervous system.

(neuroscience) A device used to perform brain imaging.

(slang, derogatory) The degradation of mental faculties, intelligence, common sense, or moral character.

(slang) alternative form of give head

Alternative form of lizard brained