If you gon' die for em, they better be some number 4's
Or some shit made in Japan you can never find in the stores

from Game – Holy Water Lyrics on Rap Genius

Meaning

Continuing from the previous line… Game states that the shoes you’re waiting for better be special if you’re willing to die for them.

eg: Jordan IV aka “number 4’s”

Also, a play on words since there is a Japanese superstition that the number 4 is unlucky because the Japanese word for 4 sounds like the Japanese word for death.

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