get (something) through (someone's) head(redirected from get it through head)
get (something) through (someone's) head
To make someone or oneself acknowledge, accept, or understand something. Look, just get it through your head: we're moving, and there's nothing that's going to change that now. I don't know how else to get it through her head that I want to break up.
get through one's head
Understand, believe, or be convinced. For example, Bill cannot get it through his head that John is moving out.