A video, picture, or any other form of media that is so retarded it melts your mind. Mindmelt can usually be found on social media, television, and movies.
Ron: That movie was actually mindmelt, dude.
when someone fakes committing suicide. usually for clout or to make people feel bad for bullying them.
jeff: i can't believe dave sonny'd himself
marcus: he's definitely sonnying. he'll come back in a few days.