Bitch when I walk in that's 10.5, that's 9.1, that's 8.9

from Lil B – Please Respect the Bitch Lyrics on Rap Genius

Meaning

The numbers could either refer to:
The amount of money he’s spending when he walks into a spot

or:
The hypothetical ratings that judges would give Lil' B when he enters a spot. Lil' B scores very high.

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