Source : WordNet®

go after
     v 1: go after with the intent to catch; "The policeman chased the
          mugger down the alley"; "the dog chased the rabbit"
          [syn: {chase}, {chase after}, {trail}, {tail}, {tag}, {give
          chase}, {dog}, {track}]
     2: go in search of or hunt for; "pursue a hobby" [syn: {quest
        for}, {quest after}, {pursue}]