Definition of flopperoo in English:

flopperoo

noun

informal
  • A complete failure, especially with theatre, cinema, or TV audiences or critics.

    • ‘The most significant portent for them may not be their stupendous flopperoo in the California special election.’
    • ‘The film was blamed for at least a dozen heart attacks and is still rated by many as the scariest film ever made, despite critics deeming it a ‘flopperoo’ at the time.’
    • ‘There was a decent audience for once, as so far this show has been a gigantic flopperoo.’
    • ‘But, as we all know, it is another flopperoo for him.’

Origin

1930s: from the verb flop + -eroo, suffix in the sense ‘large, unexpected’.

Pronunciation:

flopperoo

/ˌflɒpəˈruː/