bumper sniffer
 n.— «Department of Public Safety officer Dub Gillum points out the left lane is for passing only by law, and the “bumper sniffer” is following too close and can get a ticket without having an accident.» —“Drivers ‘left’ in lurch” by Burl McClellan Hood County News (Granbury, Texas) Dec. 17, 2004. (source: Double-Tongued Dictionary)

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