1. A preference or an inclination, especially one that inhibits impartial judgment.
2. An unfair act or policy stemming from prejudice.

Literally everyone, ever. Including the writer of this definition.

A phenomenon where bisexuals think everyone around them is also bi

A word people use on YouTube when replying to a comment. Some people say you are biased when you hate a certain type of video games, television, music, etc.

This word is annoying. People don't realize that other people have opinions too. People who use this word think that their opinion has a big impact on everybody, and that everybody should worship them for it.

Every writer of the definition of "republican" in the urban dictionary.

Having an opinion.

Mostly used by morons to describe people who disagree with them, as if having an opinion makes one a bad person.