American English

Definition of grumpy adjective from the Oxford Advanced American Dictionary

 

grumpy

 adjective
adjective
NAmE//ˈɡrʌmpi//
 
(grumpier, grumpiest) (informal)
 
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bad-tempered
NAmE//ˈɡrʌmpəli//
 
adverb
See the Oxford Advanced Learner's Dictionary entry: grumpy