When your anus burns from an excruciatingly painful turd.
Oh man, I ate so much taco bell last night that I had an anus volcanus for three hours after the poop deposit.
by poobicus August 21, 2010
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The overly large extended butthole right before you shit which resembles a volcano
Holy shit dude your dog has wicked volcanus anus!
by Urban Thinker March 14, 2015
Get a volcanus anus mug for your dog José.
The overly large extended butthole right before you shit which resembles a volcano
Holy shit dude your dog has wicked volcanus anus!
by Urban Thinker March 14, 2015
Get a volcanus anus mug for your cat Helena.