He graduated in law and journalism, and took part in boxing and football in his youth, in addition to being an art seller.
As a journalist, he was the war correspondent for the satirical magazine Hermano Lobo, for which he wrote under the pseudonym "Jimmy Corso".
As a writer, he started to write poems and published Cuya selva ("Whose jungle") and La soledad distinta ("Distinct loneliness").
According to the newspaper El País, on 29 June 1994 Giménez-Arnau was detained by police on suspicion of drug trafficking when leaving the Telecinco studios.
On 23 July 2009, Giménez-Arnau fought with sports journalist Pipi Estrada on the set of the Telecinco chat show Sálvame.