put on your thinking cap

put on (one's) thinking cap

To begin thinking or considering very carefully and seriously (about something). If we all put on our thinking caps, I'm sure we can come up with a way to earn enough money to go to the baseball game this weekend. A: "Well, boss, what do you think we should do?" B: "Just let me put on my thinking cap for a minute."
See also: cap, on, put, thinking
Farlex Dictionary of Idioms.

put on your thinking cap

meditate on a problem. informal
See also: cap, on, put, thinking
Farlex Partner Idioms Dictionary
See also:
  • put on (one's) thinking cap
  • put on one's thinking cap
  • get (one's) thinking cap on
  • put thinking cap on
  • put your thinking cap on
  • put (one's) thinking cap on
  • keep (one's) mind on (something)
  • keep mind on
  • keep your mind on something
  • blue-sky thinking