O'nyll
A person who's overthinking went so far they just stopped giving a fuck about anything in life and doesn't if he dies or lives because he just doesn't give a fuck about it.
Sam: bro did you heard? Mason stopped going to school and he doesn't do shit anymore. Jack: oh yeah i heard his parents gonna throw him out but he didn't care apparently he went O'nyll and stop caring about life. Sam: damm that rough.