supercalifragilisticexpialidocious

ADJECTIVE

informal 

  • Extraordinarily good; wonderful. 

Origin

1940s: apparently a fanciful formation based on super, popularized by the 1964 film "Mary Poppins".

Pronunciation:

supercalifragilisticexpialidocious

/ˌsuːpəkalɪfradʒɪlɪstɪkˌɛkspɪalɪˈdəʊʃəs/