"Idiotic utterance; silly nonsense; twaddle. A useful way of passing time, a productive way of releasing tension and defusing flames, as well as an opportunity to explicate one's vast knowledge of utterly useless matters." - Web definition
The other day I noticed a commentator using this term in describing blogs. He thought most blogs were drivel. It occasioned some introspection.
(Painting: "Man Imitating Cloud" - Norwegian painter, Odd Nerdrum)