bird of (one's) own brain

bird of (one's) own brain

obsolete A thought or idea of one's own conception, especially that which is confidential or unknown to others. I know not what she thinks of me, for that is a bird in her own brain and kept from my eyes.
See also: bird, brain, of, own
Farlex Dictionary of Idioms.
See also:
  • outed
  • at will
  • about (one's) business
  • about business
  • at the end of (one's) fingertips
  • at expense
  • at somebody's expense
  • at someone's expense
  • at (one's) expense
  • at doorstep