Definition of swayback in English:

swayback

noun

  • An abnormally hollowed back, especially in a horse; lordosis.

    • ‘Adjustments for a full derrière, long waist and swayback are also common for this figure type.’
    • ‘When you slouch or stand with a swayback, you exaggerate your back's natural curves.’
    • ‘Once I'd ridden on the swayback of a blue mule, tumbled off it, and broke a tooth.’

Pronunciation:

swayback

/ˈswābak/