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1.
The detours and delays of a regular vacation casused by volcanic ash disrupting your return flight home, or conversely the time you spend at home because you couldn't fly out.
Prague was great, but the volcation took in Germany, Switzerland and France on the drive back!
by StewieG wannabe April 20, 2010
 
2.
like a volcano in action.
the big bang was a giant volcation
by Brad Ennest April 10, 2007