- (idiom, slang, dated) Horse manure, especially when deposited on a road.
Etymology: Probably with reference to the supposed similarity to rotten apples.
- 1964, P. S. Martin; and F. W. Sharrock, "Pollen Analysis of Prehistoric Human Feces: A New Approach to Ethnobotany," American Antiquity, vol. 30, no. 2, p. 171,
- :Samples 7"12 contained coarsely chewed plant material; several closely resembled the "" of horse and burro.
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