Definition of whoopsie in English:

whoopsie

exclamation

informal
  • Used to show recognition of a mistake or minor accident.

    ‘he ended up going to the wrong place, whoopsie!’

noun

informal
  • 1A minor mistake or accident.

    ‘she dismissed it as a little whoopsie’
    1. 1.1British Used euphemistically to refer to a piece of excrement.
      ‘the dog's done a whoopsie on the carpet again’

Origin

1960s: perhaps shortened from whoops or perhaps from whoops + -y; compare with oopsie.

Pronunciation

whoopsie

/ˈwʊpsi//ˈwuːpsi/