Definition of while-you-wait in English:

while-you-wait

adjective

  • attributive (of a service) performed immediately.

    ‘a while-you-wait swab test’
    • ‘The sign was very small and right next to a large advertisement for a while-you-wait car wash with an arrow pointing down the alleyway.’
    • ‘The Reverend Tom Grant and George Little spent four hours on Saturday ironing bags of washing brought to them by parishioners and even performing the odd while-you-wait job for passers-by.’