Victor Moberger in Psyche:
There are many kinds of pseudosciences: astrology, homeopathy, flat-Earthism, anti-vaxx. These ‘fields’ traffic in bizarre claims with scientific pretensions. On a surface level, these claims seem to be scientific and usually appear to comment on the same kind of things that science does. However, upon closer inspection, pseudoscience is revealed to be bullshit: it is indifferent to the truth. Analogous to pseudoscience, can there be such a thing as pseudophilosophy, in which one makes claims with philosophical pretensions which on closer inspection turn out to be bullshit? I think there is.
Let’s begin with the concept of pseudophilosophy. If there is something deserving of that name, then it would be deficient with respect to philosophical issues in the same way that pseudoscience is deficient with respect to scientific issues. So, in order to get a grip on pseudophilosophy, we should first look more closely at the way in which pseudoscience is deficient, and then see whether we can find something analogous in the philosophical domain.
More here.