twenty-firster

noun

twenty-firster

noun

Etymology From twenty-first + -er.

1

Informal A person's 21st birthday.

On his twenty-firster his father, in a characteristic gesture, had given him an Indian servant, and when Sandys was at the Embassy in Berlin, this splendid creature appeared at his dinner parties in a long white coat, rows of medals […]1954, Labour Research, volume 43, page 188:

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