brainbox

plural brainboxes

1. The cavity of the skull in which the brain is contained.

   Holonyms: skull, cranium < head

   1 more example

   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

   Synonyms: braincase, brainpan, neurocranium

2. slangThe skull; the head.

   Synonyms: brain bucket, noggin, belfry, bean, beaner, belfry, block, bonce

3. slangA very intelligent person.

   Synonyms: brain, brainiac, egghead, boffin, brain, brainiac, bright spark, egghead