(psychology) an individual whose personality is dominated by instinct or impulse rather than rational thought

Alternative form of reptilian brained

of, or exhibiting a reptilian brain

(archaic) Feeble-minded, harebrained.

Alternative form of brainfood

A form of indoctrination that forces people to abandon their beliefs in favour of another set of beliefs by conditioning through various forms of pressure or torture

(derogatory) A foolish or dull-witted person.

(computing) Any hardware (i.e. handheld, computer, laptop) containing vast amounts of information, which is in constant flux and is important to the owner but not so important as to be stored in wetware.

Surgery on any part of the nervous system, especially the brain; neurosurgery. / (uncountable, idiomatic) Something that is overly complex, detailed or confusing.

A condition to which male high school and college students are prone consisting of difficulty in concentrating, mild forgetfulness, and difficulty in maintaining a train of thought, arising from "too much thinking". Physical symptoms can manifest as well.