peanut butter stirred together with honey. He called it 'gray horse'. Has anyone else ever heard of this mixture being called this?

I’ve heard of a similar mixture, but I’ve never heard it called ‘gray horse’.

When I was living on my own through my high school years, my staple food was a mixture of government surplus honey, cheap peanut butter, powdered protein mix, Special K, and wheat germ, all mixed together in one big tub. I called it ‘breakfast’ and ‘dinner’. On Saturday and Sunday, I sometimes called it ‘lunch’, too.