- grouse (n.)
- type of game bird, 1530s, grows (plural, used collectively), of unknown origin, possibly from Latin or Welsh.
- grouse (v.)
- "complain," 1885 (implied in grousergroucer, from Old French groucier "to murmur, grumble," of imitative origin (cf. Greek gru "a grunt," gruzein "to grumble"). Related: Groused; grousing. As a noun from 1918, from the verb.