Commonly known as Smegma, dead skin cells that accumulate in areas of poor ventilation and usually associated with sweaty areas. ie; Belly Buttons and a woman's vaginal area. Most seen on those who don't properly bathe!
Guy 2: Nah it's fromunda cheese!
Guy 1: Is that the fancy stuff from France?
Guy 2: I'm sure it's available in France.
Fromunda' refers to "From-unda my nuts!"