Top Definition
Portable, sometimes fixed, radar speed devices put up either by police or private agencies in an attempt to frighten you into reducing your speed. Often these lack any sort of camera, and rely on flashing lights and short messages to slow down if you're exceeding the speed while approaching them. However if it contains no camera, or you live in an area where photo radar enforcement is illegal, it affords an interesting opportunity to see how fast you can go and rack up points in miles per hour.
Everyone slowed down but John kept his foot on the gas, he got a 78 on the Mobile Scoreboard.
by RiceCake August 29, 2012

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