Falderol

Example:His explanation was just piffle that didn't address the real issue.

Definition:trivial or groundless talk or writing; idle chatter.

Example:Her theory was utter nonsense and based on no evidence.

Definition:words or ideas having no meaning, logic, or coherence.

Example:He pooh-poohed the idea of going to college, saying it was a waste of time.

Definition:treat something with ridicule or dismiss as unimportant.