What is the definition of Crown Of Thorns?

Ah, the 'crown of thorns' - a term that's as colorful as a rainbow after a supernova, but also as prickly as a thorny bush in the middle of winter! It's essentially the crown of a royalty (or a medieval king) adorned with thorns, a symbol of their power and perhaps a hint of their impending demise.

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Here's an edgy example sentence: "The CEO of the tech startup decided to crown his new CEO with a crown of thorns, saying, 'You'll learn to manage this mess, or you'll just end up in a thorny predicament.'"