Definition & Meaning of "cowshit"in English

What is the origin of the term "cowshit" and how is it used?

"cowshit" is a slang term that emerged in English in the 20th century, using the literal excrement of a cow as a metaphor for nonsense, lies, or worthless talk. The word is used to dismiss statements, stories, or ideas as false, ridiculous, or meaningless. It appears in informal speech, writing, and online commentary. The term is vulgar and derogatory, though generally mild compared with stronger insults, and is intended to express disbelief, disapproval, or ridicule.