Econ 320: Labor Economics. This guy is even worse than my previous nomination of Deardorff. Can't remember his name but he was Asian and I think he learned English like the day before class started.
He taught the class in Fall of '06. He taught us nothing about labor economics, instead he just kept trying to prove his own theories in class. He spent about 4 weeks of class time trying to explain why log functions smooth out a curve, which we already knew because we were all econ students. One month into the semester he dropped all the requirements in the syllabus and gave everyone B's. Before the final, he gave us a fixed curve and defined what an A would be, what a B would be, etc. But then proceeded to change his curve after the final and not answer any emails.
The fact that I forgot to mention this guy previously proves that he was so horrible that he became a repressed memory.