Nalgina: A vagina being so large that one can fit a Nalgene water bottle inside.
"That chick's Nalgina was so spacious my Nalcock (large, Nalgene bottle shaped penis) almost didn't fill it."
by LWW July 10, 2006
The Nalgina is the fleshy skin flap between the female vagina and in Spanish, the word for little buttox, "nalgita." It is also commonly referred to as the "perenium," "grundle," or the "gooch," located similarly on males between the penis and the chocolate eye.
I rubbed my penis along her nalgina before insertion as a method of foreplay.
by Los-Dogg August 18, 2007

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