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.
PHOTOS: Growing Up Clooney. Before They Were Famous. Oscar-winning actor George Clooney was born in Lexington, Ky., in May 1961, the son of Nina and Nick Clooney. His mother was a former state beauty queen and his father was a TV newscaster and talk-show host. Courtesy of Nick and Nina Clooney.