Shitstep is the definition of dubstep.
Mainly because its really shit and people just started calling it shitstep.

When you eat dirt for the first time and leave your family to build a shack in the woods

Also known as brostep has ruined the dubstep scene. It attracts bellends in new era caps who point gun fingers at the shit dj's which are spinning the worst non musical arrangement of mid range frequencies over a beat which slightly resembles dubstep.

Shitstep producers - borgore, stenchman, doctor p, flux pavillion, rusko and anything on a minitry of sound album.

Real Dubstep - Mala, Loefah, Cyrus, Younsta, Ramadanman, Kode 9, Kyrptic Minds, Truth