The true meaning of flipping someone off actually has something to do with archery :
The English and French were at war. The English used Longbows, which were plucked to shoot an arrow. When the French captured English soldiers, the French would cut off the english soldiers' middle fingers, which made it virtually imposible to fire the longbow. In battle, when the English made the French retreat, or just to taunt them, the English would raise their middle fingers at the French to show them that they still had their middle fingers. That's where it originated. Over time it has taken on the meaning of F.U.
Yep dumb little fact but just wanted to let it be known