Top Definition
The newest flavor of Mountain Dew, served only at Taco Bell. A play on words with the actual name, Baja Blast, for it's effects on the bowels.
Dude, I love the Butthole Blast Mountain Dew but it tears me up...

The pain is in the name.
by LeGiT ACT March 04, 2009
4 Words related to butthole blast

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