Plural of bosh; multiple instances of nonsense, rubbish, or foolish talk.
Simple plural of 'bosh,' which itself likely derives from Turkish 'boş' meaning empty or hollow, entered English in the 19th century.
Victorian British writers loved adopting 'bosh' from Turkish via India—it let them dismiss someone's ideas as completely empty and worthless in just one syllable, which was very satisfying.
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