(UK Usage) - Practically Insane, frequently in a socially appropriate way. Frequently regularly explain the behavior anticipated of some (outlying) old money households and more a likable eccentricity than a true psychological disfunction. Furious, apoplectic, absolutely beside yourself with trend. (Imagine a rabid dog, foaming within mouth and - await it! - barking...)Can additionally refer to an individual who is unbalanced (using "mad" when you look at the Brit good sense, referring to an insane person).