Bullwhack is a colloquial term that refers to nonsense, rubbish, or worthless information. When it comes to finding synonyms for this word, one could opt for terms like hogwash, balderdash, drivel, bunkum, claptrap, or poppycock. These words all convey a lack of truth or credibility in speech or writing. Other synonyms could include gibberish, twaddle, hokum, or gobbledygook, which also suggest meaningless or incoherent language. Overall, there are numerous alternative phrases that one can use to describe bullwhack, each with their own unique connotations and applications depending on the context in which they are employed.