0 to complain in an angry way: --
Oh, stop grouching!
1 a person who often complains --
2 a person who complains a lot even when there is little reason to complain --
Still, he's a reliable genius, even if a bit of a grouch, and he works well with his crewmates despite the fact that he can't get along with them.
His problem, it turns out, is that he is an unscrupulous, treacherous, selfish, greedy, lying, thieving scoundrel, and at the same time an irascible, ornery, cantankerous, ill-mannered, bad-tempered old grouch.
All this offered a more complex illustration of his life and contradicted his workplace reputation as an elderly grouch.
Speculation began as to who the grouch was.
No man can see that remarkable picture and remain a grouch.