speed bump

a rounded ridge built crosswise into the pavement of a road or driveway to force vehicles to slow down.
Slang related to speed-bump

speed bump

noun phrase
  1. A transverse hump in a road made to slow the traffic (1975+)
  2. : Aloe vera extract, fast on its way to becoming an all-purpose medicinal herb, has run into its first speed bump: a study suggesting that it delays the healing of some major surgical wounds/ Instead, the drive toward integration has been stymied by the speedbump of crime (1990s+)

Dictionary of American Slang
Copyright © 1986 by HarperCollins Publishers
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