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The practice of creating a volcano-style effect on the balls. Take one bottle of a carbonated beverage of your choice, and shake it up until the liquid is almost exploding out from the fizzing. Carefully remove the cap, and quickly cover the open top with the balls (try not to let much air escape). Enjoy the eruption, bro.
1. "Man, my girl's so uptight, she won't even give me a ballcano."

2. "I got a free sample of diet Pepsi, but I don't like the taste, so I gave myself a sick ballcano with that shit."
by silvio ballusconi April 14, 2011
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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
The severe back up of seman do to the lack of sex causing a valcano like eruption from the penis.
Frank: Man if i cant find a chic to sllep with soon, my ballcano is going to erupt!
Jimmy: I know i got like Mt. Ballhelen going on over here.
by jbeezy621 March 02, 2007
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