Short for bisexual haircut. Usually, when a bisexual girl's hair is cut to shoulder length. If you were to make sweeping statements about groups of people, typically straight girls have long hair and lesbians have very short hair, so the bisexual girls would have a haircut in-between, thus, the bi-cut.
Girl 1: You cut your hair!
Girl 2: Yeah I want girls to know I'm queer without guys thinking I'm a lesbian so I got a bi-cut.
by anon1358 July 15, 2019
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