To grumble in the gizzard; to murmur or repine. He grumbled like a bear with a sore head.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
To Grubshite * GrumbletonianNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes