Here is what may or may not be an apocryphal tale told to me many years ago on a job I was working.
A guy in his twenties gets into a cab in a bad section of Detroit. The passenger slumps down into the back seat withdrawing into his coat.
The driver makes eye contact with the passenger- “Yo, you scared?”
The passenger replies- “What? Scared? No, I’ve just got ennui.”
“Ennui, what’s that?”
“I’m bored and lost. I don’t know what to do with myself.”
“Yeah, well I got Ennui like a mother**cker!”