Definition of toodle-oo in English:

toodle-oo

exclamation

dated, informal
  • Goodbye.

    ‘we'll see you later, toodle-oo!’
    • ‘So toodle-pip for the coming week, and I will let you know how the experiment works out.’
    farewell, adieu
    View synonyms

Origin

Early 20th century: perhaps an alteration of French à tout à l'heure ‘see you soon’.

Pronunciation

toodle-oo

/ˌto͞odl ˈo͞o//ˌtudl ˈu/