Top Definition
The act of masturbating while lying flat on your back, and being too lazy to get up to jizz or even use a sock to sop it up. You knowingly jizz all over yourself and go back to sleep.
"I was so hungover from operation blackout last night I just lazy volcanoed and passed right back out."
by RapeFactory420 July 10, 2009
7 Words related to Lazy Volcano

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