One of the mysteries of the English language finally explained.
"on one's Tod Sloan": on one's own; alone.
1950s; earliest use found in James Curtis (1907–1977), novelist. From the name of Tod Sloan (born James Forman Sloan, 1874–1933), celebrated U.S. jockey also riding in Britain, as rhyming slang for own.
Tod Sloan/ˌtɒd ˈsləʊn/
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