When your girlfriend/wife/partner decides to use a power drill to create a new vagina. Most people who do this choose to drill the hole right outside the flab of the vagina. Once the hole is made, people call it their "secret cave."
Ashley: Honey, I'm getting bored with sex.

Phill: Well get me a power drill because I'm about the unleash the secret cave!
by ThePrimePenguin April 21, 2015
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