having impact on one's emotions, causing one to behave rashly

Midbrain

leader; mastermind

dumb; stupid; literally 'pig-brained'

literally 'brainless'; describes someone who acted brainlessly or recklessly

Right brain; the right cerebral hemisphere

man who is unfulfilled sexually

not thinking; mindless (spoken)

immerse oneself in

a silly and inexperienced person who always gets cheated by others

Cerebral cortex

nervous, scared, stiff and cowardice

stupid, dumb

Playing computer games

wagging one's head smugly, looking pleased with oneself (self-conceit)

cannot make head or tail of something

'ROM brain'

coward; timid; fainthearted; recoil in fear; shrink from responsibility

dejected and depressed; droopy

(literally: one's fontanelles are not closed); immature; childish

fontanelle

Skull

well-fed but always being idle; to have fat cheeks and a pot belly

(one's fontanelles are not closed); immature; childish

being stupid and obtuse

pig brain

a super computer

to immerse oneself in doing something and neglect all other things

computer science

dumb; nobhead (spoken)