Free Nelson Mandela!
All round slogan. Use it to show that you disagree with a cause and have a hard time taking it seriously. Originally used by Ali G (Sascha Baron Cohen) at an anti-abortion rally.
Crusading speaker: We will not stand and watch while God's laws are being violated! Homosexuals shouldn't be allowed to marry!
*loud cheer*
Random guy: Yeah, and free Nelson Mandela!
*loud cheer*
Random guy: Yeah, and free Nelson Mandela!