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. © 2015 Farlex, Inc, all rights reserved.

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 Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
See also:
References in classic literature ?
You want to get them ideas out of your think-box. Of course, you're goin' to marry me.
As I adjusted my detachable think-box, I tried to remember what Aristotle had said about it.
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.
It has 11 creative think-boxes, exclusively for creatives to weave their magic.