grouch / grouch/ • n. a habitually grumpy person: rock's foremost poet and ill-mannered grouch. ∎ a complaint or grumble: my only real grouch was that the children's chorus was far less easy on the ear. ∎ a fit of grumbling or sulking: he's in a thundering grouch. • v. [intr.] voice one's discontent in an ill-tempered manner; grumble: there's not a lot to grouch about.