(informal) A habitually grumpy or complaining person.
Is Grumpy an adverb?
grumpy adjective - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com.
Is grumpily a word?
Meaning of grumpily in English
in a slightly annoyed and complaining way: He grumpily agreed to do what she asked.