In Kpop, the member of an idol group that is your favorite. A person may have one ultimate bias, and many other biases from other idol groups, or only have one ultimate bias. This term is derived from "having a bias towards a particular person."
G-Dragon is my ultimate bias, but Key is my SHINee bias.
To lean towards something because you don't like something else, or you like something more than something else. Goes hand in hand with discrimination and prejudice.
Susan was biased when she was on the dating show. Contestant one was a telephone sanitizer and contestant two was a millionaire. She wanted the one with more money, even though the telephone sanitizer was a really sweet guy.