Biphobia

Biphobia is aversion toward bisexuality and bisexual people as a social group or as individuals. People of any sexual orientation can experience such feelings of aversion. A source of discrimination against bisexuals, biphobia is based on negative bisexual stereotypes and bisexual erasure.

Read more about Biphobia:  Etymology and Use, Negative Stereotypes, Current Issues of Debate, Bisexual Erasure, Monosexism