A prejudice is a preconceived belief, opinion or judgment especially toward a group of people characterized by their race, social class, gender, ethnicity, sexual orientation, age or religion Also, it means a priori beliefs (without knowledge of the facts) and includes "any unreasonable attitude that is unusually resistant to rational influence.
Examples, calling somebody illiterate because of they way they type. Love you RHOG <3
I never judge people until I get to know them :) and you shouldn't either, everybody is unique in their own way, everybody can be different and get along :)