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

extremely

I've been crazy busy

a person who is wildly irrational or out of control

they're just a bunch of crazies

extremist crazies