rat-racing n. a playful form of high-speed flying in which airplanes pursue or attempt to out-maneuver each other, similar to a game of cat-and-mouse. (source: Double-Tongued Dictionary)
Further reading
Visiting firemen doesn’t necessarily refer to firefighters. The terms visiting fireman and visiting firemen may refer to any of several types of visitors from out of town, including non-firefighting celebrities, tourists, and rowdy conventioneers...
