DEFINED:

bal·der·dash (bôldr-dash),n.
Nonsense. [Possibly alteration of Medieval Latin balductum, posset.]

balderdash \Bal"der*dash\, n.
[Of uncertain origin: cf. Dan. balder noise, clatter, and E. dash; hence, perhaps, unmeaning noise, then hodgepodge, mixture; or W. baldorduss a prattling, baldordd, baldorddi, to prattle.]

1. A worthless mixture, especially of liquors. Indeed beer, by a mixture of wine, hath lost both name and nature, and is called balderdash. --Taylor (Drink and Welcome).

2. Senseless jargon; ribaldry; nonsense; trash.

balderdash \Bal"der*dash\, v. t.
To mix or adulterate, as liquors. The wine merchants of Nice brew and balderdash, and even mix it with pigeon's dung and quicklime.

balderdash, n:
trivial nonsense [syn: fiddle-faddle, piffle]