
Take it into your head to do something
Impulse Decisions
The phrase often implies acting on an impulse, without much planning or consideration.

She just took it into her head to buy that expensive dress.
Sudden Inspiration
It can suggest a stroke of inspiration leading to unplanned action.

He suddenly took it into his head to paint the kitchen red.
Unpredictability
Using the phrase can hint at a person's unpredictable nature or behavior.

Out of nowhere, she took it into her head to adopt a puppy.
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