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1.
To laugh so hard that your abs, face, and throat hurt to the point that you don't want to laugh any more.
When I yubble I get so sore that I want to sleep.
by Shea Williamson February 20, 2004
 
2.
To act in a manner that fails, or disappoints another.
1. We were supposed to be playing doom, now you're eating a bitch's ass? Nigga ya yubble

2. You yubble harder than Kim Jong Il for passing out on me while we were playing doom.
by unequivocal January 15, 2012