A play on words of sorts that means crazy. The KRE pronounced cray, and the Z like in easy. Thus combined, makes a sick looking word, tag, and general way to describe something well, Krez!
*also when written, xtra z's can be used, and please try not to call the tag your own unless u really want to
That switch back smith was krezzzz!!!!
Man you are a total Krez-dispenser!
Food-fights are krezzzzzzzzzzzzzz
You krez butthole!