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1.
A term that employs irrational joy and hope in near dire situations despite all definable logic. Usually those employing such feelings find that situations work out in the end by twisting their logic to fit their needs.

Usually those who are a Relentless Optimist, are stubborn, high energy, positive, and every so often annoying, but always eager to keep going and do what they feel is the right thing.
Despite not getting into NYU, the Relentless Optimist believed that he would go where was right for him.
by Relentless Optimist November 08, 2010