When someone's friends draw stuff on you (such as penises) or to embarrassing things to you (no not that thing...) and take pictures; then they erase it from your face and make you think nothing happened. Later they show you the pictures in front of everyone, embarrassing the hell out of you.

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.