a person who is wildly irrational or out of control

they're just a bunch of crazies

extremist crazies

very foolish, senseless, or strange

it was crazy to hope that good might come out of this mess

I'm always full of crazy ideas

the whole thing is crazy but I don't regret it

extremely excited or enthusiastic

I'm crazy about Cindy

a football-crazy bunch of boys

(of a person) wildly irrational or incoherent

Stella went crazy and assaulted a visitor

a crazy look

(of an angle) appearing absurdly out of place or unlikely

the monument leant at a crazy angle