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)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...
Aubrey in Waco, Texas, says her mother used to warn the kids against contracting honkus of the bonkus, a fanciful name for a contagious disease. This colloquial term probably comes from the words bonk and konk, meaning “to hit” or...