"crazy"

I always hear you're "crazy" but who isn't "crazy"
What does "crazy" even mean
​​​​​​When when you do something different you get called "crazy"
After a breakup someone always calls the other one "crazy" 
The meaning of "crazy" is a mentally deranged person  
And if you ask me I think everyone is a little mentally deranged so everyone is a little "crazy"