She goin through your beeper when she know you asleep

from Three 6 Mafia (Ft. La Chat) – 2-Way Freak Lyrics on Rap Genius

Meaning

She more than likely is using you to get in contact with one of your friends, whom she desires more than you.

She is shown to be willing to sleep her way to her goal — a characterization of 36’s “freak”.

This could also be referencing a tell-tale sign of distrust: rummaging through people’s personal effects, looking for incriminatory things.

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