Juice is a slang term to mean highly suspect, as in OJ, as in, juice. When a group of people are looking shady. Your bag of weed is sparkling. Or maybe what's going on in that hoes panties. All of these can, at times, be very very juice..... proceed with caution.
"I don't know dog, that sounds juice like a mother fuckin juice"
Monica: "Those pills are looking pretty juice, man."
Aaram: "Juice? what the hell is that?"
Monica: "You know, juice, as in OJ, as in those pills are highly suspect!!"