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When a seated man farts, and the resulting air travels forward up your barse and builds up under your scrotum, creating a bubble, instead of exiting straight out your arse.
Jimmy kept a straight face even though he had a nut bubble, but when it was realeased, it was all over...
by mata September 18, 2006
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Hey I just made a Bubble Nut!
NutBubble: The process of blowing a bubble while simultaneously nutting
by Holmey January 03, 2019
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