Definition of 'maniacal'. maniacal (mÉnaÉªÉkÉl ) If you describe someone's behaviour as maniacal, you mean that it is extreme, violent, or very determined, as if the person were insane. He was almost maniacal in his pursuit of sporting records.
Throughout his career, Clooney has won two Academy Awards, one for Best Supporting Actor for his role in Syriana and one for Best Picture as one of the producers for Argo, as well as a BAFTA and a Golden Globe.
He was, however, nominated for â¦ the Best Actor Oscar for his role as Rick Blaine in the movie 'Casablanca' in 1943 which won Best Picture that year, and for his role as Lt. Cmdr. Philip Francis Queeg in the movie 'The Caine Mutiny' in 1954.