I'll fuck her all night if the beat slows down, that that down down
I'm on that DJ Quik,

from Juicy J (Ft. SPACEGHOSTPURRP & Speaks) – Deez Bitches Rollin' Lyrics on Rap Genius

Meaning

This refers to a song by DJ Quick titled, “Down, Down, Down” In that song, the phrase “Sugar free mossberg” is used leading into Speakz' next line.
http://www.youtube.com/watch?v=QVEDQ2xq5lA

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