five and fly
n.— «Hamm, of the Air Force Academy, countered that the attitude of quitting after the required five years—known as “five and fly”—was “a minority view.…One of the reasons for the exodus now is the airlines’ hiring.”» —“Academies hid expenses, audit reveals” by Keith C. Epstein in Washington, D.C. Plain Dealer (Cleveland, Ohio) Apr. 5, 1990. (source: Double-Tongued Dictionary)
Further reading
David from Matthews, North Carolina, grew up using the term cheese toastie for a type of grilled cheese sandwich. Cheese toasties are familiar in Ohio, Indiana, and Illinois, particularly around the cities of Decatur and Springfield. In the UK...
Matt from Grand Rapids, Michigan, was puzzled when colleagues kept saying someone had stood up at a wedding, indicating that they’d been a member of the wedding party. The expression stood up in that sense is an Americanism going back about two...