Usually vague references in blogs or comments to infer something negative about an individual or a group of individuals. A pathetic display of passive aggressive behavior.
Girl 1 Blog: Here are my latest paintings. Enjoy Friends!
Girl 2 Blog: OMG! Some people are so creative! Too bad they couldn’t something better with it. Painting is so stupid! In other news: I’m super hip and cool and can still hang with people in their early twenties even though I am approaching my thirties! It' true, I'm hip.
Girl 1 Blog: I don't have time to myspat with you. I have a life.
*Note how Girl 2 doesn’t name Girl 1, but makes it quite obvious she is talking about her.