When a group of gangsters shove a wooden broomstick up a man's anus as far as it will go(using some Crisco if needed), then places their foot at the entry point, and breaks the broomstick off inside the anus.

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.