Definition of whataboutery in US English:

whataboutery

noun

British
  • The technique or practice of responding to an accusation or difficult question by making a counteraccusation or raising a different issue.

    ‘all too often, well-intentioned debate descends into whataboutery’
    Also called whataboutism

Origin

1970s: from the way in which counteraccusations may take the form of questions introduced by ‘What about —?’.

Pronunciation

whataboutery

/ˌ(h)wədəˈboudərē//ˌ(h)wədəˈbaʊdəri/