To be put to bed with a shovel; to be buried. He or she was fed with a fire-shovel; a saying of a person with a large mouth.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Shove In the Mouth * Shoulder FeastNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes