Top definition
The results of too much beer, White Castles, and vallium.
I drank too much beer and had too many Whitey's last night, and now I have the volcanic shits.
by shit admin August 12, 2008
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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2
When you're constipated and a fart builds up above the stuck shut, creating more and more pressure. The end result is a painful explosion of shit scattered around your toilet basin.
Argh, my ass hurts so much after that Volcanic Shit I had.
by Archaeon December 29, 2012
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