Definition of rubber chicken in US English:

rubber chicken

noun

informal
  • Food, typically chicken, consumed at social gatherings, especially at the events and dinners necessary for a public figure to attend.

    • ‘To make matters worse, it is now suggested that MPs will have to sign some kind of contract, agreeing to abide by certain ‘values’ and to make so many speeches and to eat so much rubber chicken.’
    • ‘So here he was, doing the rubber chicken, the lunches with journos, all the stuff any normal person would hate.’
    • ‘Meantime, the past few weeks have seen a plethora of conferences to pick over the entrails, decode the smoke signals and otherwise offer Henry advice while consuming vast quantities of rubber chicken.’
    • ‘We have eaten our last rubber chicken (with a side of cheese) luncheon at the Shaw Convention Centre.’