look up any word, like bukkake:
 
1.
kool-aid
"we all love goin to Deshandas BBQ she always has that black juice ready"

or

"is that black juice sweet enough"
by L-C702 June 26, 2009
 
2.
Coffee
Me: "Dude...I am so tired."

Dude: "Hit that Black Juice son!"
by Dengus August 28, 2014