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A Mexican pronounciation of the name "John". It can possibly refer to a homosexual, someone with a soft voice or simply a means of harassment to people named John.
"Wow, Yahn, what the hell is wrong with you?"
"I like men."

by OhMyGodAFlyingChinchilla February 15, 2008
Originates from the great russian siberian tiger. The fiercest animal on the asian and europian continent. The name is given to the ones that are destined for greatness. Yahn totally destroys the name of Micheal.
That Yahn kid is so much beastlier than that michael kid.
by Beast2255 April 15, 2009