Definition of whopping adjective from the Oxford Advanced Learner's Dictionary

 

whopping

 adjective
adjective
BrE BrE//ˈwɒpɪŋ//
 
; NAmE NAmE//ˈwɑːpɪŋ//
 
(also whopping great)[only before noun](informal)
 
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very big The company made a whopping 75 million dollar loss. You are entitled to a whopping 40% off the recommended retail price.
See the Oxford Advanced American Dictionary entry: whopping