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In some senses, one-and-done is marked as informal, slang, idiomatic, US. Watch for register when choosing this word.
one-and-done
noun 4
Definitions
noun
1
Something that is completed or accomplished only once, never to be done again.
2
A basketball player who plays college basketball for a single year and then declares for the NBA draft.
John Calipari's Kentucky squad was made up of one-and-done players.
3
The act of a team making the postseason playoffs but losing the very first game played in it.
4
A family in which the parents decide to have only one child.
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