Top Definition
a vent in the girl's crotch through which lava, steam, ashes, etc., are expelled, either continuously or at monthly intervals.
Tampon manufacturing, a multi-million dollar enterprise, is fueled by regular girlcano eruptions from women of all ages.
by Ben & Dave November 03, 2007

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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