one-and-done

== English == === Pronunciation === === Noun === one-and-done (plural one-and-dones) (informal, idiomatic) Something that is completed or accomplished only once, never to be done again. (slang, basketball) A basketball player who plays college basketball for a single year and then declares for the NBA draft. (US, informal, sports) The act of a team making the postseason playoffs but losing the very first game played in it. A family in which the parents decide to have only one child. === See also ===