balderdash

Senseless talk or writing; nonsense.

Where, you cried in the name of Wonder, have you been able to gather together such an old fashioned Bundlement of Scientific Balderdash?

[He] has the audacity to demand of us, for this twattle, a ‘speedy insertion and prompt pay.’ We neither insert nor purchase any stuff of the sort. There can be no doubt, however, that he would meet with a ready sale for all the balderdash he can scribble, at the office of either the ‘Rowdy-Dow,’ the ‘Lollipop,’ or the ‘Goosetherumfoodle.’

A worthless mixture, especially of liquors.

[T]hey would no more liue vnder the yoke of the Sea, or haue their heads waſht with his bubbly ſpume or Barbers balderdaſh, [...]

1637, John Taylor, Drinke and Welcome, London: Anne Griffin, “Beere,” Indeede Beere, by a Mixture of Wine, it enjoyes approbation amongst some few (that hardly understand wherefore) but then it is no longer Beere, but hath lost both Name and Nature, and is called Balderdash (an Utopian denomination) …

Obscene language or writing.

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 [...]

With me your work will be easy and your life happy, with him you will be a drudge and the lacquey of a drudge [...]: from me you will hear none but pious and edifying conversation; from them nothing but balderdash and blasphemy in an outlandish dialect [...]

To mix or adulterate.

That which is made by the peasants, both red and white, is generally genuine: but the wine-merchants of Nice brew and balderdash, and even mix it with pigeons dung and quick-lime.