The act of turning your forsekin inside out and twisting your penis several times to then unleash it spraying smegma in a swift-like fashion. This is usually done in the center of a group of people at a party or classroom.
Guy 1: "Hey! Did you see what I did at the party last night?"
Guy 2: "No, what did you do?"
Guy 1: "I managed to pull off the most epic smegmachine gun of all time!"
Guy 2: "Dude, no way!"
Guy 1: "Yeah! I even managed to hit my Grandpa who was fast asleep on the couch!"
The name given to he (or she) who demonstrates the ability to administer face meltingsolo's, perform super cool phrases and make the sax look damn fine, sexy in fact...
Martin: Damn man, check out that dude on lead alto... his super freaky!
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi