V is for...

Commonly known as V is for Victory, the origin of the hand sign has been credited to this person.

Take care in using the V hand signal - lest your V gesture be misinterpreted as an insult (if you mean for it to be an insult, have at it!). Leave it to the British to turn a Peace Victory into an Up Yours. For more Brit slang, look here.

I received a bit of early training: from these guys in this movie.