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