rough rider

noun

Something, such as a steam locomotive, that does not travel smoothly when in motion / (formerly) A person whose speciality was the breaking in or training of wild horses.

The rough rider galloped through the rugged terrain.

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詳細

意味（1）

Something, such as a steam locomotive, that does not travel smoothly when in motion

It is common knowledge that the Stanier Class 5 4-6-0s can be very rough riders at speed, owing to "knock" in the trailing left-hand axlebox, and this tendency would be eased with any lengthening of the cut-off.

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