Meaning of big whoop in English:

big whoop

Pronunciation /ˌbɪɡ ˈwʊp/

exclamation

(also big whup)
informal North American
  • Expressing dismissiveness: ‘So what?’ ‘Who cares?’.

noun

(also big whup)
informal North American
  • Something of importance or significance; a big deal. Usually in negative contexts, as "no big whoop".

Origin

1980s. From big + whoop.