'Grumpily' definitions:

Definition of 'grumpily'

From: WordNet
adverb
In an ill-natured manner; "she looked at her husband crossly" [syn: crossly, grouchily, grumpily]

Definition of 'Grumpily'

From: GCIDE
  • Grumpily \Grump"i*ly\, adv. In a surly manner; sullenly. [Colloq.] [1913 Webster]