deranged

de·ranged | \ di-ˈrānjd

Definition of deranged

1 : mentally unsound : crazy sense 2a a celebrity being stalked by a deranged fan After which we conclude that though it's satisfying to think we could murder our enemy in ambush (since it needs to be done), only a deranged or suicidal person would carry out such a plan.— Richard Ford "This man is deranged," I said to myself, very much frightened.— Joseph Conrad

2 : disturbed or disordered in function, structure, or condition My leg was propped up on a library chair at the time, as it was too deranged to bend.— Cynthia Gorney But other work indicates that, in addition, the B lymphocytes of lupus patients are inherently deranged …— Moncef Zouali

3 : wildly odd or eccentric His life was crowded, rather than peacefully isolated, and certainly never of an Olympian detachment, even though he was capable of quite deranged gestures of show-offy extravagance—such as buying an enormous house, more suitable for a banker than a painter …— Robert Hughes Or you could take part in a deranged computer game where you had to cycle after a huge beach ball, scoop it up and throw it through a hoop, scoring points for each goal.— Natasha Ellis