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When one cums uncontrollably like a volcano.
Girl #1 "Hey girl, we sure gave my husband a volcano dick last night huh?"

Girl #2 "Yeah we did, he wouldn't stop cumming!"
by ThePonyLover92 July 02, 2017
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2
When you are so fat that the skin around the base of your shaft becomes so plump that it starts to engulf your dick.
How big was his dick?
I’m not sure, he had a volcano dick.
via giphy
by ggnoodles July 23, 2018
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