When one is sitting down in the bathtub and farts. Making stinky bubbles arise from the water passing out the back of the ass or between the legs and balls tickling the balls and or vagina, and creating a thundering blast against the tub.
As mike was sitting in the bathtub he farted, creating a thundering noise against the tub for everyone to hear, and also creating stinky bubbles that imersed through the sides of his balls and to the surface of the water. Creating Thunder Bubbles.
by JonnySahls May 21, 2010