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.

See also: all, head

See also:

all in (one's) mind
all options stink
AOS
Don't bank on it.
don't ask me
don't ask me!
(I) won't tell a soul
bum trip
banking

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