get/take it into your head that...

get (something) into (one's) head

To believe that something is true. Get it into your head: I'm in charge until Mom gets home, so you have to listen to me. A: "Why is Johnny holding his breath?" B: "Well, he's gotten it into his head that holding his breath will make him taller."
See also: get, head
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

get/take it into your ˈhead that...

(informal) think or believe something, often wrongly: Somehow she’s taken it into her head that her husband is trying to poison her.
See also: get, head, take
Farlex Partner Idioms Dictionary © Farlex 2017
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