Green’s Dictionary of Slang

(US black) a general intensifier, wonderful, extraordinary etc.

2011		Jay-Z & Kanye West ‘Niggas in Paris’ 🎵 That shit cray, ain’t it Jay?
2014		Eble UNC-CH Campus Sl. Spring 2014.
2016		languagejones.com 15 June 🌐 Cray Cracy Note that the white mainstream use favors reduplication (so cray cray) whereas the AAE use does not (tha shi cray ‘That shit is crazy’).
2017		67 ‘Waps’ 🎵 Dip, dip, dip, dip, from qway dipping's been cray.