Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Surly and peevish; cranky.

from The Century Dictionary.

  • Surly; gruff; glum.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Collog. Surly; dissatisfied; grouty.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Unhappy, dissatisfied and/or irritable, a word which is particularly applied to babies and children or adults who are acting childishly.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective annoyed and irritable

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

grump +‎ -y

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