What is meant by "internet atheists"?
I'd never heard the term before either.
according to UrbanDictionary.com it would be an
"Angry atheist who trolls internet sites denouncing God, Christians and religion; Atheist internet troll who demonstrates a basic ignorance of reason; Atheist internet troll who is ignorant of science and logic while claiming strong adherence to the same; Atheist who contradicts themselves through poor reasoning, especially one who exhibits hypocrisy."
another source claims that internet atheism "concerted effort to win the youth of America and the world. Hundreds of websites and blogs on the Internet seek to convince and convert adolescents, endeavoring to remove any residue of theism from their minds and hearts by packaging atheism as the choice of a new generation."
yet another source calls them "a socially inadept hack that copies and pastes hate-filled, profanity-ridden blasphemous rants over and over again and congratulates himself for being a Thinking Man."
Google it and you'll get a googol of hits. The label seems rather like the term "fast fashion" in the sense that no one who uses it seems particularly complimentary to those they label thusly.
I learn all sorts of stuff here.