Anattā (Pali: 𑀅𑀦𑀢𑁆𑀢𑀸) or anātman (Sanskrit: अनात्मन्). For all I could find, the "An" part means something like "not", and supposedly Attā means "Self", so Not-Self. I say supposedly, because apparently Attā is more like "Soul", or "Essence", or at least something permanent, eternal, absolute, or unchanging. Not-Self was confusing for me, because I do feel like (I have) a self and although it is a trick my mind plays on itself for practical purposes, it is kinda handy.

So I now take Anattā to mean "I might kid myself that I am in any way constant or unchanging or a beautiful unique undying snowflake soul, but that is neither scientific reality, nor does it help my brain get out of survival mode".

Which is kinda long, so Anattā it is.

source: anatta.md