Lyrics: "You couldn't converse if you had fucking React Juice."
Artist: Phife Dawg
Track Title: "Motivators"

In the mid-90s, Converse was producing a line of basketball sneakers containing React Juice. This React Juice, held inside of a bubble underneath the sneaker, would move to the area of the foot that needed the most support to encourage optimal performance. Which means if you had React Juice and you were still struggling against Phife Dawg, it may be time for another job.

This line does have a new meaning years later. The React Juice line had to be recalled because the bubbles would break and leak liquid all over the court. Basically, when you think you should have the upper hand on Phife, he's still going to catch you slipping. ZING!