One who teaches and/or practices the art of being a douche, also known as douchism.
Man I think we need to have an intervention for Alex, I'm pretty sure he's a douchist now.
An over opinionated individual who doesn't feel the need to think things through on their personal beliefs.
'it's important to respect other peoples beliefs. But if you're a ********* you're a dipshit!' *reader scrolls through the text and shakes his or her head* 'another Douchist'
A(n) supporter of/action that supports the lifestyle of douche.
The comments he makes are very douchist. I do not follow that ideal, so I cannot be friends with him. I am sorry.