Dirty Becca is when you eat a rotten octopus and then throw up, then eat the throw up only just to get diarrhea which you then drink and start the process all over.

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.