The battle of Agincourt was fought between France and Britain in year 1415, just before this war British war industry had invented a big bow using “yew” tree. This weapon was a bunker buster of the time not only because of its penetration upon impact but because of distance it could reach. British soldiers used their middle finger to release the cutthroat arrow; French soldier loathed this weapon with such a vengeance that they would chop the middle finger of any and every captured British soldier.
The battle concluded in favor of Britain, celebrating British soldier showed their middle finger to defeated French army chanting loud “PLUCK YEW”. Years after this battle ground victory culture of enchantment took an indecent linguistic dive, the words that accompany the display of middle finger today is a castigated form of same old pluck yew none the less keeping the meanings more or less consistent.