In his prime, thug life is now on radar
By ‘Thug Life’ Kendrick is tying this line to Tupac, who has a Thug life tattoo across his stomach. Radar is something that can tell you where people are. K.Dots saying that people are still searching for Tupac.
Also could be saying that Kendrick found found the same thug life mentality that Pac had, meaning it is now on the radar, or on the map.
To help improve the meaning of these lyrics, visit "The City" by Game (Ft. Kendrick Lamar) Lyrics and leave a comment on the lyrics box