vague, useless, impractical, sub-literature level, specious and glossy works of liberal arts (written or oral) typically produced and delivered by not-so-well-rounded college/university professors who hate mathematics and natural sciences, but are well-versed in their professional-sounding useless BS lectures, and usually make their students bullshit long, diffusive and vague essays. These profs are known as the undisputed masters of BS or more specifically, vague arts.