'hogwash' originates from English, specifically the compound 'hog' + 'wash', where 'hog' meant 'pig' and 'wash' meant 'liquid used for washing or kitchen refuse (swill)'.

'hogwash' originally referred to the swill or refuse given to hogs in the 19th century; it later shifted to a figurative sense meaning 'worthless talk' or 'trash' and became the modern English word 'hogwash'.

Initially, it meant 'liquid or kitchen refuse fed to hogs', but over time it evolved into its current meaning of 'nonsense' or 'worthless talk'.