Technically speaking, they are politically mindkilled undiscriminating skeptics. They make a list of things they don't believe (sometimes for good reasons, sometimes merely for associating them with a different political tribe), and make fun of them. They use "rationality" as an applause light, but not as modus operandi. They are usually correct in situations where being correct is trivial for a generally educated person. That is already better than a great part of internet, but people can also do much better.