grouch(noun, verb) noun1. a bad-tempered personSimilar word(s): churl, crank, crosspatch, grumpDefinition categories: person verb1. show one's unhappiness or critical attitudeSimilar word(s): grumble, scoldDefinition categories: communication, complain, kick, kvetch, plain, quetchSentences with grouch as a verb:- He spent all his time grouching about the problem instead of fixing it.