sag wagon
n.— «A “sag wagon” will follow the riders to pick up any who have mechanical difficulty or find the ride too strenuous.» —“State Plans New Event on Bikeway” Commonwealth Reporter (Fond du Lac, Wisc.) June 16, 1967. (source: Double-Tongued Dictionary)
Further reading
There was a time when William Shakespeare was just another little seven-year-old in school. Classes in his day were demanding — and all in Latin. A new book argues that this rigorous curriculum actually nurtured the creativity that later flourished...
John in Omaha, Nebraska, wonders about a phrase that encourages someone to attend an event or risk being left out or feeling uncool: be there or be square. Don’t fall for the fake etymology about people wearing boxes on their heads! Ditto for...