What is the meaning of "mk666"?

Based on the search results, "mk666" is a term that is often associated with the dark web and may refer to various things:

1. Mark of the Beast: In some contexts, "mk666" may be related to the biblical concept of the Mark of the Beast, as described in the Book of Revelation. This mark symbolizes allegiance to the Antichrist and is often associated with evil or negative connotations.
2. Cipher or Code: The term "mk666" could also be used as a cipher or code on the dark web for nefarious purposes or to indicate specific meanings within a hidden network.
3. Internet Forum Username: Additionally, "mk666" might be used as a username on internet forums, especially those related to dark or mysterious topics.

It's important to note that due to the secretive and sometimes illegal nature of activities on the dark web, the exact meaning of "mk666" may vary depending on the context in which it is used.

Learn more:

1. Dark web - Wikipedia
2. The Dark Web
3. The Dark Web: Research Pit Of The Internet's Underworld