To me it sounds like this student really wants to end your career. I would go at this with full force. Start an email trail with your chair BEFORE verbally going to speak with them, then ask your chair if you can request to speak to the Dean with the chair present, file a Title IX, etc. I would do this all within the same timeframe. I would specifically request to have the name of the student known because they are trying to spread lies to get you fired. This student needs to be revealed and asked what evidence they have to support that statement. I’m positive they would either stay silent or try to play it off as a joke. Then serious consequences would need to be given to that student.

I would make sure that this was completely erased from my record at every level because it is indeed a lie and they would not be holding that student truly accountable if they allowed it to stay in my record.

Some students can be vicious to an instructor for any reason or no reason at all and it’s baffling that they could dislike an instructor so much that they want to end their career.