Gusset Fudge 

The crusty stains left on the gusset of womens underwear, due to the discharge and subsequent drying of vaginal juices. Usually of whitish appearance, it is sometimes a darker tan color, especially when the lady has a little bit too much cheese on the taco or is straight up diseased

I couldn't go down on her after I saw the gusset fudge in her panties

Gusset Fudge by krisboro February 2, 2008

Gussetfudge 

The nasty goo that gets left behind in some women's panties. Sometimes crunchy, sometimes chewy, but always worth a sniff or two..... lmao....

Goddamn, these bloomers are packin' a snatchload of Gussetfudge !

Gussetfudge by Marty from Oz November 25, 2003