from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Foolish and nonsensical talking.
- n. The study/science of foolishness resp. foolish and nonsensical talking.
from the GNU version of the Collaborative International Dictionary of English
- n. Foolish talk; nonsense; folly.
from The Century Dictionary and Cyclopedia
- n. Foolish speech.
From Old Greek μωρολογία (morologia) (composed of μωρία (moria) „foolishness“, and λόγος (logos) „word, talking, science“). (Wiktionary)
And even though I don't have a degree in morology, I can tell it is a vast kingdom with millions of subjects all over the world.