all in (one's) head(redirected from all in her head)
all in (one's) head
Not substantial or real; having been imagined or invented. I don't know why you think I don't trust you. I can assure you that it's all in your head. Cindy isn't mad at you, it's all in your head. No, I really don't hear any strange noises. I think it's all in your head.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.