A general rule applied to any androgynous person or character. Often used in relation to emasculate emos and goths. The rule states that if one cannot determine the individual's gender within 5 seconds, the person in question is automatically a man, or dude.
I always thought Justin Bieber was actually a chick, but then I applied the dude by default rule.
by Lacedaemonius October 29, 2010

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