— grumpily , adv. — grumpiness , n.
/grum"pee/ , adj., grumpier, grumpiest .
surly or ill-tempered; discontentedly or sullenly irritable; grouchy.
Also, grumpish .
[ 1770-80; grump expressive word, first attested in the phrase humps and grumps slights and snubs + -Y 1 ]