"That Shit Cray" T-Shirt Design

You may be interested to know that it is almost certainly a reference to the Schizophrenic twins Ronald and Reginald Kray. They were crime lords in London in the 50's and 60's, the police failed to locate them on numerous occasions. 

Bringing us to this line as evidence. 
"Ball so hard, Muthafuckas wanna find me (that shit Cray, that shit Cray)"
The implication being that Kanye and Jay-Z are crazy brothers that are at the top of the game and can't be touched.