Pantspissers are usually teenagers (or just act that way) and try to appear "edgy" and "unique" but just achieve "irritating little snot". They will often describe themselves as "misunderstood", roll their eyes at anyone who enjoys mainstream entertainment, and make passive aggressive comments over trivial points on message boards and in chatrooms.
Typically can be silenced for awhile by challenging them in the same manner because they are, in fact, only cowardly little pantspissers.

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.