Definition of ventre à terre in English:

ventre à terre

adverb

  • At full speed (used especially of a horse's movement or its representation in painting).

    • ‘He arrives ventre à terre, only to have her die in his arms.’
    • ‘This is a romance with all the right stuff: passionate love and, best of all, a hero who rides ventre à terre to save his beloved.’

Origin

French, literally (with) belly to the ground.

Pronunciation:

ventre à terre

/French vɑ̃tʀ a tɛʀ//ˌvɒ̃tr(ə) ɑː ˈtɛː/