1. The act of producing a piece of music - particularly a vocal rap - of which upon listening, innocent civilians have no choice but to commit suicide.
2. When a person (or persons) dance around on a deserted rooftop on their own at dawn or dusk in New York, doing a rap that was clearly written by a three year old child trying to impress his friends in the playground at school, then stolen by Mike Posner.
Teen 1: 'hey man, have you heard this Posnering new song? It's a total Posner!'
Teen 2: 'Oh Jesus, that is the worst thing I have ever heard. I just puked blood. I'm going to go and slit my throat.'