You Kobe number 8, she no longer wants your number

from XV – That's Just Me Lyrics on Rap Genius

Meaning

The cheerleader wants nothing to do with the jock after being with Xv. She doesn’t want his phone number but this could also be that she doesn’t want to wear his jersey number which is tradition for a cheerleader to do in high school.
Kobe switched from number 8 to number 24, and just like Kobe she got rid of yo digits

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