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.
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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.
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a cross between "yup" and "buddy" you say it to your buddy when your going to do something for them.
"are you going to take the trash out buddy?" "Yubbly!"- (I.E yup i will buddy!)