When someone assumes a moral high ground and holier than though attitude and virtue signalling to add moral lessons to everyday discussions. Always unsolicited.
What I just told you was a trueincident that happened in my life. Stop moralsplaining about it as if I made it all up.
Meaning to complain or moan about an issue to someone who is fully aware of the issue and agrees with you. A form of mental health self care. Inspired by mansplain.
Mandy found herself moansplaining to her colleagues about the failure of line managers to understand HR processes.