Phrase: the old, slam-bang, thank-you-ma'ams (automobile tires circa 1925 probably)

[Robin Hamilton]

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From: Wilson Gray

...  and we have the possible source of _speedbreaker_ "speedbump," used
(only?) by BE-speakers in the Saint Louis of my youth.

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In the UK, the urban version of these are (sometimes) known as Sleeping
Policemen.

Robin

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