After a bit of trawling through Urban Dictionary (that ahem well-known scientifically founded and reliable source) I found this:
”a person who is very self-involved and constantly talks about themselves, their likes, their hobbies etc. while never really listening or caring about anything the person they are talking to has to say unless it related to them (the mimi). This person absolutely despises talkative persons because she hates having to listen to other people and it takes up time that they (the mimi) could be using to talk about themselves.
Classic signs of the mimi are:
- no eye contact while listening
- someone who talks over you when they realize you're about to talk so that you shut up
- someone who rambles on and on even though the person they are talking to is clearly not listening.”
Sounds more like it than ethereal Australian spirits.
Interesting choices of pronoun in that main paragraph, though. They - they - they - they - they - she - they - they …