Top definition
The act of wet farting with an especially low toned, bubble popping quality. Reminisent of geothermal mud pools, or molten lava, that expel gas through large surface bubbles.
Likely to leave uncomfortable 'reah splotch in undergarmets. Can be disastrous if one is freeballin'.

Possibly the root of the "brown noise."

I was trying to cut an SBD in the elevator, but ended up blurping mud in my shortpants!
by dfiantone December 15, 2005
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