Definition of gong show in US English:

gong show

noun

Canadian
informal
  • A situation or event marked by chaos and incompetence.

    ‘At the check-in counter, none of the machines were printing boarding passes or baggage tags. What a gong show!’
    ‘we need a majority government to stop the gong show in Ottawa’

Origin

1980s: from The Gong Show, a television program originally broadcast in the US 1976–8 that featured talent competitions with comically unskilled amateur contestants.