Oxford Dictionary:
supercalifragilisticexpialidocious
Syllabification: su·per·ca·li·fra·gil·is·tic·ex·pi·a·li·do·cious
Pronunciation: /ˌso͞opərˌkaləˌfrajəˌlistikˌekspēˌaləˈdōSHəs
(also supercalifragilistic)
[u][b]adjective[/b][/u]
[i]informal[/i]
Extraordinarily good; wonderful: the only word to characterize Kepler’s discoveries was ‘Supercalifragilisticexpialidocious’ a supercalifragilistic day of fun
albeit, he did misspell it