What does it mean to call someone a unicorn?

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The hunt for the unicorn does signify jesus christ for the meaning of the word unicornus is latin for uni- meaning one and -cor meaning heart and -us meaning us. The heart is one; the heart is us! Or the be more precise. The heart is one but it beats as many so not to be alone. Hence the sacred heart. Here we have the hidden meaning of the unicorn. It means the search for enlightenment or self-realization; the realization that there is only oneself (je-sus, je-shua, je-shiva, one-self, bio-logos) desiring companionship, friendship, love. Hence the gospel of love.
~ Wald Wassermann