think-box

think box

slang One's head or brain. Sometimes hyphenated. There doesn't seem to be much activity in that think box of his. Come on, Janet, that was a dumb mistake. Use your think-box for a change! The mob boss ordered his goons to put a hole in the witness's think box.
See also: box, think
Farlex Dictionary of Idioms.

think-box

n. the skull; the head. Use your think-box for something other than to hold your ears apart.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • get a makeover
  • have a makeover
  • bleeding edge
  • in demand
  • give (one) a makeover
  • hit and miss
  • hit or miss
  • hit-and-miss
  • accidentally
  • accidentally on purpose
References in classic literature
You want to get them ideas out of your think-box. Of course, you're goin' to marry me.
The Valley of the Moon
As I adjusted my detachable think-box, I tried to remember what Aristotle had said about it.
From Sleepers Awake (1946)
But all the time I am ejecting jewels from my think-box, I find myself thinking, "No one is listening to me, because no one has electricity with which to watch TV." WAWA is totally victorious.
The WAWA syndrome
It has 11 creative think-boxes, exclusively for creatives to weave their magic.
On the creative floor BBH London