be not (oneself)(redirected from not been yourself)
be not (oneself)
To not feel as one normally should, either physically, mentally, emotionally, etc. I'm sorry for getting upset at you earlier, I'm just not myself today. I know Mary hasn't been herself ever since she lost her job.
See also: not
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.