sorry my freind but as you bought the urbandictionary.com into this yank is defined as
http://www.urbandictionary.com/define.php?term=yank
1. A term used by the British to describe all Americans.
2. A term used by American Southerners to a. describe Union Forces during the American Civil War; b. Post Civil War reference to Americans from non-Southern States.
3.
Slang for male masterbastion.
4.
A term to describe pulling something very hard and fast (see number 3)
1. "Oh, God! Its a Yank!"
2. a. "Its a Yank! Shoot it!
b. John Boy: "he called you a Yank, Billy Bob"! Billy Bob: "No body call my a Yank!I am going to shoot you, you Limey Bastard!"
3. "
Are you yanking that thing again" or "go yank your wanker"
4. "
I yanked it so hard, I got blisters"
does this by definition make you all wan**rs