brainbox
noun/ˈbɹeɪn(ˌ)bɒks/
Etymology From brain + box.
1
The cavity of the skull in which the brain is contained.
- Holonyms: skull, cranium < head
- The compromise was to use as much of the skull as possible by pushing the eyes in towards the centre, and relegating the brain box to the rear.1985, J.D. McDonald, Australian Birds: A Popular Guide to Bird Life, Sydney: Reed Books, page 142:
2
Slang The skull; the head.
3
Slang A very intelligent person.