crotch crust
On laundry day, the milky white flaky powder found in the crotch of a particularly sexual young lady.
I perused the assortment of pretties in her laundry basket, finding crotch crust in her panties.
Potato Chip Crotch Crust
The layers of discharge that build up in a girls panties and flakes off.
After a long day out and about, Erin had built up some serious potato chip crotch crust.