Never mind = don’t worry, forget it…
“Mum I failed my exam”.
” Never mind, you can try again.”
On my mind = something you are worried about…
“The exam has been on my mind.”
Out of my mind = worried, drugged…
“I’ve been out of my mind with worry over the exam.”
Never you mind = for someone else to forget, not worry about something.
” Mum, why did uncle Carlos touch your bottom?”
“Never you mind,” says mum.
To describe personality…