Rick Ross and 2 Chainz -- two of the most prolific star rappers of their generation, and collaborators with nearly every other big name in the genre -- squared off on the latest installment of Verzuz, Timbaland and Swizz Beatz' live video battle series.With over 200,000 viewers tuning in over Instagram at the event's peak, and untold more watching over Apple Music, the two MCs traded hits, ad-libs and extremely genial barbs for two hours, as fans rapped along on Twitter and reminisced about a