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.
The actor took home the Oscar for his portrayal of AIDS patient Ron Woodroof. Matthew McConaughey won the Oscar for best actor for his performance in Dallas Buyers Club on Sunday during the 86th Academy Awards. PHOTOS: Oscars 2014: The Red Carpet Arrivals.