to be just out of one's teens, to be scarcely out of one's teens
Contexto
At the Menier, prodigies are on trial. Arthur Rimbaud was already a ground-breaking poet when as a teenager he was adored by the older Paul Verlaine. Christopher Hampton was scarcely out of his teens when he wrote about the men's tumultuous years together, during which Verlaine divided his sex life between his wife and Rimbaud, and ended by shooting his fellow poet in the hand.