straight cut dickhead

1. One who wants to massively fuck you over and see you suffering in exams, life etc. Gets a sense of schadenfreude, without caring what other say, no matter what.
2. Self-assured person who has cultivated being a dick to the highest level.

That teacher is a straight cut dickhead, none of his exam questions can be answered from his notes, and he makes us spend 3 months learning irrelevant bs in class.