A complaint, a grumble, a fit of ill-humor. / One who is grumpy or irritable.

(intransitive) To be grumpy or irritable; to complain.

simple past tense and past participle of grouch

plural of grouch

Third-person singular simple present indicative form of grouch

present participle of grouch

A cranky, antisocial puppet character who lives in a garbage can, from the children's television show Sesame Street.

plural of morning grouch

(informal) A person who tends to be bad-tempered in the morning.

(originally university slang) Irritable; easily upset; angry; tending to complain.