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: nonsense; empty talk
"If Mr. Austin has indeed taught nuclear physics, he needs to do better than toss out some jingoistic pseudoscientific balderdash, assuming that nobody will know how specious his ideas really are." – comment on The Augusta Chronicle Web site, December 17, 2012
About the Word:
At one time, balderdash ("origin unknown") referred to an odd and usually objectionable mixture of drinks (such as beer and milk or beer and wine). Balderdash with a capital "B" is now the name of a family board game.