Sharp’s Alley blood worms, n. — Green’s Dictionary of Slang

Sharp’s Alley blood worms n.

[proper name Sharp’s Alley, an abattoir near the Smithfield meat market in London]

beef sausages or black puddings.

1859, 1860		Hotten Dict. of Modern Sl. etc.
1864, 1867, 1870		Hotten Sl. Dict.
1890–1904		Farmer & Henley Sl. and Its Analogues.