Panphobes are typically people who hate pansexual people. They’ll often argue that pansexuality contributes to bi erasure, etc.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

A hater of pansexual people. Mostly a vacant ass.