What is an onychophagist?

my mom did, I did also but quit and my son sez he doesn't but I think he does

I had a violent upbringing and chewed my nails almost to the quick when I was little. so defo nerves and emotions

This becomes serious if it’s scratching or cutting to let blood appear. !!!

I'm trying to get my nails to grow. I'm not likely to bite them except if one is loose anyway. I hate hang nails.