I'm Shamu with twelve pair
Shamu is a famous whale at Sea World in Florida
By “12 pair” he means lungs! (not testicles)
Also means he now has 12 pairs of sneakers.
Adding on the “Coming up for airs” Shamu can comes up for air more frequently and does it in a more flashy fashion = More and better sneakers
To help improve the meaning of these lyrics, visit "Failure" by Lupe Fiasco Lyrics and leave a comment on the lyrics box