Woo, it's like the blues
We gon' ride out on this one

from Jay Z – My 1st Song Lyrics on Rap Genius

Meaning

Jay was supposed to ride off into the sunset after this song, the last track on what was supposed to be his retirement album. So he lets the beat continue playing to do some shout-outs

Perhaps he feels the beat is little bluesy (sampled from “Tu y Tu Mirar Yo y Mi Cancion” by Los Angeles Negros), or he’s just feeling a little sad about this being the end of his career
http://www.youtube.com/watch?feature=player_embedded&v=IsddPHU-VnY

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