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Similar to the preceding 4 months (Movember, Decembeard, Manuary & Febroary) 'Marcho' is an excuse to not shave for a 5th month in the name of manliness or laziness or whatever.
Dude 1: Woah man you look like Tom Hanks in Castaway!
Dude 2: Yeah I'm doing Marcho.
by Wilsooooooon! November 02, 2013