Synonym for alt-right. Often used to imply they're not actually white supremacists and are just doing all that stuff to shock the normies. The tendency for this claim to be true is inversely proportional to the age of the speaker.
This word is also used in the wider internet culture as an insult to someone who attempts to be overly cool or dark. These people may also be referred to as "Edgelords," so as with Deus Vult, pay attention to context.