Best definition
A person with whom you are really close with online but are estranged outside the world of the internet, especially

so even when you encounter each other on a daily basis in real life.Pronounced weh-buh-dee

Jimmy (not a webuddy but a real life friend): Hey, why don’t you ever talk to Amy? Aren’t you two like super best friends on Snapchat?

You: Oh, nah, she’s just a webuddy. We don’t really talk to each other in real life.