E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Bosh.
A Persian word meaning nonsense. It was popularised in 1824 by James Morier in his Adventures of Hajji Baba of Ispahan, a Persian romance. (Turkish, bosh lakerdi, silly talk.)
1
I always like to read old Darwins Loves of the Plants; bosh as it is in a scientific point of view.Kingsley: Two Years Ago (chap. x.).