The act of slowly creeping to young honey's on the dance floor without their consent; then to proceed to thrust hips lightly towards the party of said females who are completely unaware of the "jorter's" presence. Typically the "jorter" or "jorting" party are sporting demin shorts; aka "jorts".
Mike: Hey dude, check out Jorts!
Justin: What the hell is he doing, man?
Mike: He's fucking jorting on those poor ladies!