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A slang term for Fuck Nawa 420, Nawa is a private boarding school in French Gulch, California.
It was a parody of Cool Nawa 530 that English Teacher Russell Clark had as his computer password for quite some time
Jake and Gavin could be seen shouting 'F.N 420' as they threw Joey's bike over the bridge into the creek.
by Self-destructive Seductive Me October 29, 2010