To complain; to murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner.
To utter in a grumbling fashion.
To make a low, growling or rumbling noise, like a hungry stomach or certain animals.
A low thundering, rumbling or growling sound.
The sound made by a hungry stomach.
A surly complaint.
To unleash one's anger on (a person or thing other than the one that caused it)