Shit I hit dimes - what I need with a nine

from Usher (Ft. Diddy & The Neptunes) – I Don't Know Lyrics on Rap Genius

Meaning

Diddy can fuck all the 10/10 girls he wants, why would he ever be with a 9/10 girl? Also a double entendre, with “9” being short for a 9 mmm caliber

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