Top Definition
n. abbreviation for "yoga instructor I'd like to fuck"; an endearing or confessional term used by yoga students in private reference to their hot and/or enchanting yoga class instructor.
"I'm willing to pay more at the studio on 15th Street because their bikram class is lead by this total YIILF. I totally want to meditate in his lap."
by yoga_dude April 21, 2009

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