balderdash
Senseless talk or writing; nonsense.
uncountable
Where, you cried in the name of Wonder, have you been able to gather together such an old fashioned Bundlement of Scientific Balderdash?
A worthless mixture, especially of liquors.
archaic, uncountable
[T]hey would no more liue vnder the yoke of the Sea, or haue their heads waſht with his bubbly ſpume or Barbers balderdaſh, [...]
Obscene language or writing.
obsolete, uncountable
Trugge, therefore, (who has a foul mouth of his own, when he pleases) talked balderdash to Mrs. Sudberry, through the key-hole, which she did not answer, for, indeed, she seems a civil spoken woman, truly [...]
Where it comes from
Unknown, possibly from the early English drink of wine mixed with beer or water or other substances that was sold cheaply.
Adapted from the Wiktionary entry balderdash (CC BY-SA 4.0).