Top Definition
You Can Only Kill Yourself Once. Inspiried in YOLO
When doing something stupid or extreme that you know will go REALLY bad, worst than yolo.

"Let's jump from this airplane that's at only 30,000ft from the ground, without a parachute!" "Yolooo!", "No.. YCOKYO!"
by ycokyo2012 September 26, 2012

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