Noun: A competition played between two straight males in which each man develops an erection and proceed to rub their boners together. A winner is crowned when one man's boner stays hard and the other's goes flacid.

Note: Regional rules apply: Different areas define a victory by losing your boner first... in other areas the still-stiff man is the victor.

Regardless of differing regional rules, "No Homo" is in effect for the duration of the competition.

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.