The idea that causes men to accept any voluntary female attention as an invitation to start a relationship, as described in When Harry Met Sally.
The Bane is a social contract based on the idea that no woman would otherwise befriend you.
I think this girl likes me, but I'm worried about Billy Crystal's Bane.
Another term for a drug dealer who sells crystal meth
"Hey let's give that guy on the corner some money."
"Nah, he's probably an advocate for the Billy Crystal foundation"