1)Still trying to 'Make it'. 2)Sticking with something long after any success is possible. 3)An act of self denile based on the stuborn need to justify a career choice in the arts: Actors, musicians, Great American novelist. 4)Sticking with a ridiculous belief system because you pissed off so many people over the years you can't just own up and apologise.
1)"This 56 year old waiter showed me his head shot. Serious Post Dramatic Stress Disorder."
2)"He moved to LA. He still thinks metal is going to be big again."
"He's got Post Dramatic Stress Dissorder and thinks he's Vince Neal."