To be ottomised; to be dissected. You’ll be scragged, ottomised, and grin in a glass case: you’ll be hanged, anatomised, and your skeleton kept in a glass case at Surgeons’ Hall.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Ottomy * OvenNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes