The American Heritage® Dictionary of the English Language, 4th Edition
adj. Tending to complain or grumble; peevish or grumpy.
the GNU version of the Collaborative International Dictionary of English
adj. given to complaining or grumbling; prone to show annoyance at slight provocation; irritable.
The Century Dictionary and Cyclopedia
Sullen; morose; peevish; grouty.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. annoyed and irritable
Word Usage
"The reason people are grouchy is because they are starting to wake up and realize that the FEEL-GOOD-DON'T-SWEAT-THE-DETAILS ELECTION OF 2008 is having some pretty costly consequences."