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A beard that is untamed and unkempt. It is often worn by academics (for counter cultural reasons) or guerrillas (for practical reasons) as they fight the tyranny of capitalism, fascism, tradition, and the status-quo.
Girl: 'Won't you use a beard trimmer? You look homeless!'
Guy: 'I don't look homeless, just revolutionary!'

"Che Guevara, Karl Marx, Darwin and Jesus had such revolutionary beards!"
by Erickd December 10, 2009
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