Bincel
One who is bisexual and has been unsuccessful in finding a same sex mate, but has had heterosexual partners. Derived from bisexual and incel, as in involuntary celibate.
Jessica: I really want to explore my sexuality with another woman but unfortunately I’m a bincel.
Jake: You’re a what?
Jessica: I’m bisexually incel.
Jake: You’re a what?
Jessica: I’m bisexually incel.