noun. A cranky complaining person.

noun. A fit of ill temper. Used with the.

intransitive verb. To mutter complaints.

intransitive verb. To behave in a grumpy manner.

noun. a habitually grumpy or complaining person

verb. to complain

verb. to be grumpy

noun. a bad-tempered person

"My biggest grump is that I checked it out of a library."

disagreeable person  unpleasant person  

crab  crabby person  fire-eater  hot-head  misanthrope  

Hump  Trump  bump  chump  clump  

caddie  corker  crystallites  dahn  ejecta  

grumped  grumping  grumps