Fear not anonymous comment poster......
I have looked up the definition of crazy on dictionary.com and found the definition that fits my description of crazy perfectly and hopefully yours as well.
This is the informal definition of crazy.
Possessed by enthusiasm or excitement: The crowd at the game went crazy.
Intensely involved or preoccupied: is crazy about cars and racing.
The person that Delilah might or might not work with is definitely possessed by enthusiasm and is most definitely intensely involved in whatever he is doing.
The first and actual definition of crazy is: affected with madness; insane. One could have an argument that the person you know and love could be that type of crazy based on the team he likes, and I'm not talking about liking the Browns either. ;-)
By the way, not so anonymous are you?