get (something) into (one's) head

(redirected from get into his head)

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

get into one's head

Also, get or take it into one's head . Form an impression, idea, or plan. For example, What strange idea has she got into her head? or He took it into his head that you want to quit. [Late 1600s] Also see get through one's head.
See also: get, head