1. grouch - Noun
2. grouch - Verb
a bad-tempered person
show one's unhappiness or critical attitude
Source: WordNetWoman: the peg on which the wit hangs his jest, the preacher his text, the cynic his grouch and the sinner his justification. Helen Rowland
A grouch escapes so many little annoyances that it almost pays to be one. Kin Hubbard
I'm really 95 percent Mr. Rogers, and only 5 percent Oscar the Grouch.' George Steinbrenner
I don't mind playing absolute bastards... I just don't want to play the grouch. Hume Cronyn
I believe I have a sunny disposition, and am not naturally a grouch. It takes a lot of optimism, after all, to be a traveler. Paul Theroux
When two ageing good friends fight, it's because of an old grouch. African Proverb