A comment in an online forum or discussion board about a topic that is, itself, about a comment or the author of a comment rather than the topic being discussed.
Metacomments typically occur as a series of negative
personal comments between participants and tend to derail the topic of
conversation, descending into
chaos (or brilliance, depending on your perspective).
Person 1: I thought the movie was boring. And the lead actor is way too unattractive to take seriously as the love interest.
Person
2: Your boring and unatractive.
Person 1: It's "you're" and "unattractive"
dumbass. Learn to spell.
Person
2: Oh,
sorry. Is this better? You're unattractive.
Person 1: Nice one, bitch.
Person 3: It was much better than Cats. I'm going to see it again and again and again.
Person 1: What?
Person
2: Huh?
Person 1:
Fucking dork.
Person 2: Yeah, prolly lives in his mom's basement.
Person 1: True. And you should "prolly" learn how to spell "probably" too.
Person 2: Ugh.
Person 4: What's with all the metacommentary? Can we get back to talking about the movie?
Person 1: No.
Person 2: Shut up.