one and done
n.— «A few years ago, the NBA changed its rules so that high school players couldn’t go directly to the pros. They had to play at least one year in college. The colleges applauded. Now, many coaches wish they’d just left it alone. One-and-done is proving more disruptive and counterproductive than none-and-done. You get a great player, you get a sniff of great things, and you get a broken heart.» —“One-and-done should be satisfying to no one” by Bill Dwyre Los Angeles Times Apr. 11, 2009. (source: Double-Tongued Dictionary)