Definition of fuddle duddle in English:

fuddle duddle

exclamation

Canadian
humorous
  • Used euphemistically in place of an expletive.

    ‘for fuddle duddle's sake start acting like a man!’

Origin

1971: used by the Canadian prime minister Pierre Trudeau ( Trudeau, Pierre), who defended himself against accusations of silently mouthing an obscenity in Parliament by claiming that he had in fact mouthed an innocuous word that might have been ‘fuddle duddle’.

Pronunciation

fuddle duddle

/ˈfʌd(ə)lˌdʌd(ə)l/