Lyric should be:
Ice Water metallic
There’s never been any proof that Jay-Z is homosexual, but “the gay rapper” (as if there could only be one!) was a persistent rumour at the time of this song. And Jay-Z was the rapper most often connected with it (others included Erick Sermon and Q-Tip). All unsubstantiated rubbish of course, but definitely a widely known rumour. And that rumour is what Nas is referring to here.
bless the brothers on the ground
The next line and the ones six below follows on from this.
from Bronx to Massapequa
A mere 20+ miles.
I’m not getting grapes at all here. It’s either cribs or Cris (as in Cristal). I think Cris makes more sense.
I think he’s running with thugs that fought monks.
The phrase square biz means truth or “the real”. As in this song:
Cause who I are is living the life of Pablo Escobar
Some think this line is “I drop science like girls be dropping babies”
And they are correct.