Unnecessarily lengthy and/or overly frequent comments posted to a blog; or the habit of extreme verbosity when posting blog comments; or the useless content within such unnecessary comments.
Tom: Wow! Gina must spend her whole day on this blog! She posts a comment on every thread that gets started here! But it's all babble ... she only comes up with something really worth saying about two or three times a month!
Dick: Yeah, she's got a bad case of bloggorhea. She obviously needs to get a real life.