The medical term you are looking for is "queef". Seriously! Try using that in a Scrabble game.

that is brilliant heywood. i have been laughing my tits off,that is my word of the month.
i found this video about it

http://www.collegeslackers.com/video/how_to_queef

Wow . . um . . . Once again, I don't know quite what to say about that. She is definitely not the shy type.

Ive found a great Viz type write up on queef in the Urban Dictionary:

In the eighteenth century, it was common practice for small groups of well-to-do Southern women to each lift up their corsets and "queef" at their leisure on warm, summer afternoons. Typically performed on balconies or porches, these women would insert various large objects in their TOOTS and slowly pull them out to create the desired sound. These "porch parties" would provide hours of fun for the ladies while the men were away, and, from a practical standpoint, at times, enough air circulation as a respite from the brutal summer heat. Small wagers were often placed with the winner going to longest continuous queef, highest pitch, lowest pitch, smelliest, and wettest. There was also the queef sing-a-long; and a special prize was given to any women whose queef could attract wildlife.