Meaning

noun pretentious or silly talk or writing

originFrom 19th-century British slang tosheroon, from or alongside tusheroon, of uncertain derivation from British slang caroon (“crown, a 5-shilling silver coin”), from Sabir and (originally) Italian corona (“crown”). The term was either derived from or influenced by madza caroon, the British slang for the Sabir and Italian mezzo corona (“half-crown”), possibly under influence from tosh (“copper…

Etymology from Wiktionary, CC BY-SA 3.0