Empty babble, nonsensical talk. The etymology of this word is doubtful, for in no word do writers more widely differ. It seems to be connected with the Icelandic bulder, "the prating of fools" (Jamieson); and the Welsh ball dardd or ball dordd, "to babble, prate, or talk idly" (Boucher). It is chiefly used in conversation.
They would no more live under the yoke of the sea, or have their heads washed with his bubbly spurm or barber's balderdash.--Nashe.
Mine is such a drench of balderdash.--Beaumont and Fletcher.
Enough (the king) all balderdash!
I'll none of it! so cease the trash!--Reynard the Fox, p.24