What is 1337 hacker?

Excuse me, could you please elaborate on the term "1337 hacker"? It seems to be a unique jargon within the cybersecurity or hacker community, and I'm curious to know its origin and meaning. Is it a reference to a specific type of hacker, or perhaps a level of skill or expertise? Additionally, how does it differ from other hacker labels or groups, and what implications does it have in the broader context of digital security?