From Longman Dictionary of Contemporary Englishbiggiebig‧gie /ˈbɪɡi/ noun 1 [countable] informalBIGSUCCESSFUL something very large, important, or successful I think their new CD is going to be a biggie.2 → no biggie
Examples from the Corpus
biggie• The latest Disney movie is a biggie. 