I can't think of any prejudices I have against a particular type of fellow creature. I wouldn't own a Chihuahua, but I don't have a prejudice against them - I just feel sorry for them. Well, Okay ... rats. It is possible they are loving, responsible, misunderstood, and on all taking birth control. But, if I ever actually saw one in my house, I don't think I could look past my preconceived ideas of them as disease carrying, prolific, filthy things long enough to find out.
I have long since noticed that the words of people that want everyone to know how "not prejudice" they are which they accomplish by either announcing themselves as such and/or unjustifiably attacking someone/something for being "prejudice" - often don't jibe w their actions. Ugh. I just take people on an individual basis. I don't have to prove anything, much less that I am "not" prejudice.
The meaning of "prejudice" is different from "dislike". I dislike people that are so impressed with themselves they assume I should be, too. That is a personality trait and generally can't be discovered w/o talking/listening to someone. I will waste no energy on trying to look past such undesirable "personality traits".