put your thinking cap on

US /pʊt jʊər ˈθɪŋkɪŋ kæp ɑn/
UK /pʊt jʊər ˈθɪŋkɪŋ kæp ɑn/
"put your thinking cap on" picture
1.

to think seriously and creatively about a problem or challenge

:
•
We need to put our thinking caps on to solve this complex problem.
•
Okay everyone, put your thinking caps on, we need a new marketing strategy.
:
a feather in your capcapthink on your feetput your finger onput your oar inthinkthinking