In laymans terms, a bisexual with a fancy name.Johnny Novgorod said:(The hell's "pansexual"?)
In less laymans terms, it's being attracted to people regardless of biological sex or gender identity. It's also called "gender blind".
In not laymans terms, I'll quote the wikipedia article:
EDIT: in joking terms, it's a person who is sexually attracted to kitchen implements.Wikipedia said:Pansexuality, or omnisexuality, is sexual attraction, sexual desire, romantic love, or emotional attraction toward persons of all gender identities and biological sexes. Self-identified pansexuals may consider pansexuality a sexual orientation, and refer to themselves as gender-blind, asserting that gender and sex are insignificant or irrelevant in determining whether they will be sexually attracted to others.