Another one of those dumb insults that idiots on the internet use. It does not really have a recognized definition and is only used by idiots on the internet trying to make themselves sound cooler.
Person: Avatar The Last Airbender is my favorite anime!
Person 2: ur a dumb noobfag its not even anime.
3👍 3👎
Computer (or other device) viruses that you get from going to scam websites that are redirected from (usually) porn.
Kid 1: My computer is so slow!
Kid 2: *checks search history* Looks like you got a case of Cyber STDs.