five and fly n. (baseball) a five-inning pitching performance followed by a withdrawal (in order to qualify as the winning pitcher without finishing the game); (military academies) combined education and service lasting no more than the required five years. Editorial Note: Often attributive. (source: Double-Tongued Dictionary)
Further reading
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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...
A variant, in both baseball and military usage, is five and dive.