A person who likesdubstep so much, that they start having sexual feelings for them.
Person 1: Hey, do you want me to show you this dubstep song?
Person 2: Okay! *starts unzipping pants*
Person 1: DUDE WHAT THE HELL!
Person 2: Don't you know? I'm dubsexual.
A person is obsessed with dubstep. Symptoms include uncontrollable stomping to dubstep, listening to dubstep with the volume on max all the time, an uncontrollable urge to "womp" (making a noise that is trying to recreate the deep oscillating lows of dubstep music)