I'm Shamu with twelve pair

from Lupe Fiasco – Failure Lyrics on Rap Genius

Meaning

Shamu is a famous whale at Sea World in Florida

By “12 pair” he means lungs! (not testicles)

It means he now has 12 pairs of sneakers.

Could also be referring to the Air Jordan XII released in 1997 in the Obsidian/White colorway which would add to the Shamu reference.

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

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