Merriam Webster
sarcasm - the use of words that mean the opposite of what you really want to say especially in order to insult someone, to show irritation, or to be funny
You see, on the surface I was saying that maybe j-dub had bad taste in movies because the critics all seemed to enjoy the movie and he did not. When in reality I was poking fun at such a position in an attempt to be humorous, because as j-dub pointed out, critics are a bunch of pretentious assholes that take themselves way too seriously. Maybe Spracne can weigh in, but I thought it was an appropriate usage of sarcasm. It's possible that I'm wrong.