a goner
A Goner is when you're so far gone you might as well be watching a video of yourself dying.
I'm a goner. I just watched a 2-hour video of my cat chasing a laser and I'm crying.
My brother is a goner. He got lost in the mall and came back with a hot dog.
My neighbor is a goner. He took a nap at 8 AM and hasn't moved since.