Nonsense, bluff, or exaggeration; fine dry dust raised by cattle or livestock; Australian slang for lies or deception.
From 'bull' (in the sense of false or exaggerated talk, from the term 'bull session') plus 'dust.' Australian slang solidified this meaning in the 20th century as a term for obvious falsehoods.
Australian slang created 'bulldust' as a creative alternative to stronger words—like 'balderdash' and 'poppycock,' it's a euphemistic way to call someone a liar that sounds almost affectionate!
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