rule of 90
n.— «Many boomers are approaching what’s called the “rule of 90″—the sum of age and years of employment required to qualify for a full pension under the Minnesota Public Employees Retirement Association system.» —“Retiring boomers will leave cities big shoes to fill” by Mary Divine Pioneer Press (St. Paul, Minn.) Apr. 2, 2006. (source: Double-Tongued Dictionary)
Further reading
When a teenager went a week without talking as part of a school project, he noticed a surprising side effect: Instead of rehearsing a response to what other people were saying to him, he was focused on listening — and feeling smarter as a result...
After our conversation about towns with extremely short names, many listeners wrote to tell us about Why, Arizona. Others pointed out that there are towns called Ely in Iowa, Minnesota, and Nevada. Other super-short appellations include Rye, New...