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."
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.