from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Tending to complain or grumble; peevish or grumpy.
from the GNU version of the Collaborative International Dictionary of English
- adj. given to complaining or grumbling; prone to show annoyance at slight provocation; irritable.
from The Century Dictionary and Cyclopedia
- Sullen; morose; peevish; grouty.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. annoyed and irritable
From grouch + -y. Originally US college student slang. (Wiktionary)