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1.
A mucus-like substance that forms on the outer vaginal lips, usually as a result of sustained coital activity. Presents itself in various colors, from white to muddy brown. Occurs as a result of the sexual lubricants coagulating due to friction and the drying effect of exposure to the air.

More commonly referred to as fanny batter.
Darling, would you mind terribly if I wipe away the cunt sludge before performing cunnilingus?

or

Jeez, my cock is covered in your cunt sludge!
by Irritatus Maximus September 18, 2007
 
2.
the wet resedue on a vagina when a female is aroused or has had sexual intercourse! see also fanny batter
i love the taste of her cunt sludge
by mike January 05, 2004