The phenomenon of having to come out as bisexual to the same person/people repeatedly because they assumed or hoped that your sexuality was a "phase." Refers less to the holiday and more to the 1993 Bill Murray comedy film in which the main character experiences the same day over and over.

A very loyal, friendly and outgoing, emotional and real person, he’s honest most of the time but he will do anything if it means to prevent hurting someone. He truly loves his girlfriend and will never do her wrong, tends to treat his close friends like family. But most of all he has a big dick and is ready anytime to fuck!