Yes, it's internet slang. From Wiktionary: (slang, of a person) Not caring what others think about one's personality, style, or behavior; focused on maintain

Yes, it's internet slang. From Wiktionary: (slang, of a person) Not caring what others think about one's personality, style, or behavior; focused on maintaining individuality. (Internet slang, 4chan) Praiseworthy and admirable, often through exhibiting independence and security.