n. (pl. same)
1 any of various game-birds of the family Tetraonidae, with a plump body and feathered legs.
2 the flesh of a grouse used as food.
Etymology: 16th c.: orig. uncert.
2.
v. & n. colloq.
—v.intr. grumble or complain pettily.
—n. a complaint.
Derivatives:
grouser n.
Etymology: 19th c.: orig. unkn.
Useful english dictionary. 2012.