Answer:By definition crazy is related to wild, aggressive behaviour while insane refers to a mentally unstable person. However I don't think people really make that distinction in their speech. Both can be used to express that something is wild or out of the ordinary too. Exclamations, like "That's crazy!" or "You're insane!"
Explanation: By definition crazy is related to wild, aggressive behaviour while insane refers to a mentally unstable person. However I don't think people really make that distinction in their speech. Both can be used to express that something is wild or out of the ordinary too. Exclamations, like "That's crazy!" or "You're insane!"