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.
© Webster 1913.
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.
Smollett.
© Webster 1913.