Meaning "From Under" - Australian Style.
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!
"Dude, I went down on my date last night and she had a horrible case of Fromunda Cheese, I couldn't finish the act!"