Definition of bish-bosh in English:

bish-bosh

noun

informal, rare
  • Nonsense, rubbish, foolish talk. Also as interjection Compare "bosh".

Origin

1920s; earliest use found in The New York Times. Probably a reduplication (with vowel variation) of bosh.

Pronunciation

bish-bosh

/ˈbɪʃˌbɒʃ/