To put one's thinking cap on
To put one's thinking cap on (English) — To say that you are taking time to pander, to think over something. Whether to recollect it, to think out pros and cons (good and bad), plot a plan, or to allow time to delay as an excuse if suspecting bad intentions, or to allow someone to finish something themselves. "Explain an idiom...hmm. Let me put my thinking cap on."
To put one's thinking cap on — Razmišljati o čemu. Mućnuti glavom. Lupati glavu, Mozgati.