redshirt
v.— «Parents who “redshirt” their 5-year-olds instead of enrolling them in kindergarten are a concern to some Nebraska educators who are trying to reverse the trend of holding children back until age 6 to start school.» —“Guidelines Developed Some Educators Oppose ‘Redshirting’ 5-Year-Olds” Omaha World-Herald Mar. 1, 1985. (source: Double-Tongued Dictionary)
Further reading
Chris in Omaha, Nebraska, asks about the use of the adjective husky to describe the boys’ clothing section in a department store. This coded term refers to clothes made for heavier fellows. Husky was originally a positive term connoting the...
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...