1. A cranky complaining person.
2. grumps A fit of ill temper. Used with the: "Hannah had the grumps, for being up late didn't suit her" (Louisa May Alcott).
intr.v. grumped, grump·ing, grumps
1. To mutter complaints.
2. To behave in a grumpy manner.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.