Top Definition
To maintain a moderate-to-high level of stress in day-to-day life, regardless of the potential good or bad.
Joe: Are you having a good day?

Rob: Yeah, but I'm experiencing some stressimism about how long it will stay good...

Tom: Not doing so well?

John: Not really, work has had me feeling pretty stressimistic about my circumstances.
by AngryAmish March 27, 2010

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