Etymology
Advertisement

grump (n.)

"ill-humor," 1727, in humps and grumps "surly remarks," later the grumps "a fit of ill-humor" (1844), then "a person in ill humor" (1900); perhaps an extended sense of grum "morose, surly," which probably is related to Danish grum "cruel;" or perhaps suggested by grumble, grunt, etc.

updated on November 17, 2012

Advertisement
Advertisement
Definitions of grump from WordNet

grump (n.)
a bad-tempered person;
Synonyms: grouch / crank / churl / crosspatch
From wordnet.princeton.edu, not affiliated with etymonline.