thinking cap

noun
a state of mind marked by reflection or concentration: If we put on our thinking caps, we may come up with the answer.

Origin:
1870–75

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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American Heritage
Idioms & Phrases

thinking cap

see put on one's thinking cap.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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00:10
Thinking cap is always a great word to know.
So is gobo. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Example sentences
Now being on medication and with my thinking cap on and make a good life for
  myself.
Put on your thinking cap and make a picture of things that you can do.
Put on your thinking cap and make a wise decision that will have a positive
  long-range effect on your piggy bank.
Once you've acknowledged the mistake, put on your thinking cap and rally your
  team to help you plan your next steps.
Idioms & Phrases
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