A blend of animation and enigma/enigmatic.

Noun: An anigma is an animated video production or illustration that has mysterious or puzzling (enigmatic) qualities.

Adjective: Anigmatic means mysterious or puzzling as conceptually applied to an animation of some kind. Does not have to be a formal animation video or illustration -- could just be something that can be perceived from an animated aspect.

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.