Marilyn Manson — Simulates Wrist-Slashing After Paris Jackson Song Dedication

Marilyn Manson took a knife to his arm and simulated a wrist-slashing during his L.A. concert last night … moments after dedicating a song to Paris Jackson.

The knife is attached to a microphone — which Manson has used as a prop in previous concerts … but in the wake of the Paris Jackson song dedication, it had a bigger impact during last night”s show.

We broke the story … hours before Paris took a meat cleaver to her arm at her Calabasas home earlier this week, she “threw a fit” because she wasn”t allowed to attend a Marilyn Manson show.

Manson dedicated the song “Disposable Teens” to Jackson last night … and had previously extended an open offer to Paris to attend his shows whenever she wants.