She kept grouching about the slow service even after the manager apologized.

Whenever the project hits a snag, he grouches about the schedule.

The neighborhood's old grouches exchanged stories on the park bench every afternoon.

Her sudden grouch about the seating arrangements surprised everyone.

He tends to grouch when he's tired.

When the waiter dropped the tray, my brother grouched about having to clean it up.

Oscar the Grouch grumbled as he sifted through a new collection of tossed-away treasures, insisting that nothing in his trash was worth anyone's time.

Morning grouches filled the commuter train, scowling as if the coffee had betrayed them.

Don't talk to the morning grouch until they've had their coffee.

Her sudden grouchiness made the morning meeting awkward for everyone.