She ain't know, we ain't know, try to trap her but she ain't slow

from Justin Timberlake (Ft. A$AP Rocky, J. Cole & Pusha T) – TKO (Black Friday Remix) Lyrics on Rap Genius

Meaning

This could be referencing to the music industry as she or to a some specific girl. Pusha ties his verse to the theme of the original song of JT which is also song on music industry or some chick.

“She aint slow” could be referencing to the video for the original of the song, when the girl knocks JT out.

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