Another name for a beaver. Originally from a cartoon I saw where two beavers aka, "vagina squirrels" preferred this term over the standard "beaver". They felt "beaver" was a tad pejorative.
Hey dude what's that? "Oh just a couple of vagina squirrels building a dam." Shit, basements gonna flood again!

Or perhaps, you'd prefer:

Man, you remember spring break, dude the place was crawling with vagina squirrels, it was so thick, I had them coming out my ears, I had no idea where to begin...
by suki matutso November 7, 2004
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