A teenage boy or man who isn't fat at all, and is actually quite attractive, but has self-esteem issues like that of a 15-year-old girl.
Fatty mikes are usually straight, but have EXTREMELY feminine qualities, like reading their girlfriend's YM & Cosmopolitan magazines, waxing pubic hair, and are weirdly emotional.
See also metrosexual.

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.