Definition of biggie noun from the Oxford Advanced Learner's Dictionary

 

biggie

 noun
noun
BrE BrE//ˈbɪɡi//
 
; NAmE NAmE//ˈbɪɡi//
 
(informal)
 
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an important thing, person or event This year is going to be the biggie in his career!
See the Oxford Advanced American Dictionary entry: biggie