Definition of sparrow fart in English:

sparrow fart

noun

in phrase at sparrow fart
informal
  • Very early in the morning.

    ‘I never thought I'd catch you up and about at sparrow fart’
    • ‘Paid up and rearing to go we presented for our first game drive at sparrow fart next morning.’
    • ‘So, up at sparrow fart, on the plane, I was asleep.’
    • ‘Another blowy grey morning and off at sparrow fart to see David Trimble's appearance on the platform.’