unhealthy or related to disease -- especially of a serious long-term illness
Morbid obesity is sometimes defined as being more than 100 pounds above average weight for the same height.
She has a morbid self-obsession.
Her prison-door was thrown open, and she came forth into the sunshine, which, falling on all alike, seemed, to her sick and morbid heart, as if meant for no other purpose than to reveal the scarlet letter on her breast.
Nathaniel Hawthorne -- The Scarlet Letter
By October, my morbid life was in full swing.
Dave Pelzer -- A Child Called It
I don’t know if you’ve ever felt like that. That you wanted to sleep for a thousand years. Or just not exist. Or just not be aware that you do exist. Or something like that. I think wanting that is very morbid, but I want it when I get like this.
Stephen Chbosky -- The Perks of Being a Wallflower