to write a condescending comment on someone's facebook wall in order to demean and insult them.
Paul: Here's a quote from my newest story: "blah blah"
Emberriser: that sucks, you are an incompetent writer.
Paul: what? I think it's ok, at least.
Emberriser: You suck dick, I have at least 4 years writing experience.
Other: You just got emberrised!