I back it up, cause I don't give a fuck

from Mike WiLL Made It (Ft. Juicy J, Miley Cyrus & Wiz Khalifa) – 23 Lyrics on Rap Genius

Meaning

Twerk Team

A reference to Cali Swag Districts song called Back it up and dump it or perhaps to a line in the Young Money song Every Girl

Back it up and dump it, back back it up and dump it

Also, she shows her willingness to really curse, which she shows again in SMS (Bangerz).

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