Pablum refers to worthless, empty ideas. Pablum is a big load of hooey.
Pablum is one of many words for ideas that are worthless, dumb, silly, and especially empty. If someone is talking and talking but not saying a whole lot, they're spewing pablum. Pablum lacks specifics and depth. Pablum was originally the name of a breakfast cereal that was soft, easy to digest, and kind of empty: just like ideas that are called pablum.