Put On Your Thinking Cap idiom informal
To take time to think and consider something thoughtfully and seriously
If you put on your thinking cap, you will soon find the answer.
Let's put on your thinking cap and give the matter some serious thought.
Is the result worth the effort we have to put into it?
To take something into consideration in a thorough way
1. If you say enough bad things about someone, some of them will be believed.
2. Try many different ways or ideas, some of them will work.
Put on your thinking cap. (Image Source: Pinterest)
'A thinking cap' was previously a variant of the idiom 'a considering cap'. That term has gone entirely out of use now but was known since at least the early 17th century, such as in Robert Armin's Foole upon foole, 1605:
"The Cobler puts off his considering cap, why sir, sayes he, I sent them home but now."
Eyes with dark rings around them
I get eyes like two burnt holes in a blanket after sleepless 2 nights