My great guts are ready to eat my little ones; my guts begin to think my throat’s cut; my guts curse my teeth: all expressions signifying the party is extremely hungry.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
See also the definition in Nathan Bailey's 1736 dictionary of canting and thieving slang.
Gunpowder * Guts and GarbageNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes