Green’s Dictionary of Slang

silent beef v.

(US Und.) to attach a note to an individual’s police record stating that they have been suspected (but not charged due to lack of proof) of committing a crime; the note requests that they be punished to the maximum extent for such lesser charges that can be brought.

[US]S. Morgan Homeboy 140: He rejoiced that he was being silently beefed for the pharmacist, not Rooski.