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1.
When you are extremely happy or at a loss for words.
Mom: Happy birthday, here's the key to your new car. Are you happy?

Billy: Heck ya, I'm going crazy like.
by Bryan and Alex April 15, 2004
 
2.
As spoken by Renee Zellweger's slutty character Gina in Empire Records, crazy like means overly hyper and active.
Renee Z's slutty character: "You know it's too early ... It makes the customers all crazy like."
by KrW September 07, 2005