What is the d word?

Excuse me, could you possibly clarify what you mean by the 'd word'? I'm not entirely sure if you're referring to a specific term within the cryptocurrency or finance industry, or if it's a colloquialism I'm unfamiliar with. Cryptocurrency and finance encompass a vast array of jargon and acronyms, so a little more context would be greatly appreciated. Is there a particular aspect of these fields you're trying to inquire about?