1. To defy authority; usually a government entity or employer. However, any person, organization, group, etc. that oppresses someone may be considered "The Man."
1. I'm not going to work today because my boss is a douche-tool. I'm going to "Fuck 'The Man'".
2. I'm not going to pay my federal or state taxes because I don't think I should have to pay for other people's things or pay the government to do things I don't approve of. I'm going to "Fuck 'The Man'".