adjective, grump·i·er, grump·i·est.
Origin of grumpy
Examples from the Web for grumpily
"I don't like that little buffer," declared Lane grumpily as we walked on.Hurricane Island|H. B. Marriott Watson
"Don't know as I see what the lass wants mair nor she's got," he told himself, grumpily, as he plodded along the road.A Son of Hagar|Sir Hall Caine
I muttered, grumpily, that I had no particular respect for Falk.Falk|Joseph Conrad
"Give me another chance and we'll have another chase," I told him grumpily.Highways in Hiding|George Oliver Smith
I get on better with them now, and even Sir Walter is gruffly kind and grumpily amiable.Story of My Life, volumes 1-3|Augustus J. C. Hare