yilly is just another word for awesome or cool.
that was so yilly. your so yilly

OMg. you are so yilly
by mikilla October 28, 2006
YOUNG WILLY.
The appreciation of beautiful young boys.
Yilly....River Phoenix, Justin Beiber, Rob Lipsett, One Direction (X-Factor), Romeo Beckham
by chickenmeow October 11, 2010
Young willy.The subject of cougars or older women who now want the young calf rather than the bull.
Yilly like Ashton Kutcher and Demi Moore,musician Jake Wheatley-Curran and actress Kate Walsh
by Meow meow meow September 25, 2013

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