Where does “off the hizzy” come from?

off the hizzy (English) comes from English off the hizzle, from English -izzle — A slang suffix to form hip-hop-sounding words,...

Ancestry of “off the hizzy”, step by step

Step	Language	Word	Meaning
1	English	off the hizzle	Off the hook, fresh, awesome, cool, excellent
2	English	-izzle	A slang suffix to form hip-hop-sounding words,...

off the hizzy — Etymology, Origin & Word History | Etymology Explorer