Smegma; a white, cheesy sebacceous secretion from under the foreskin. This tends to be very foul smelling stuff. It can also accumulate under the skin covering the clitoris. Be sure to bathe every day so when your lover goes down on you they do not shudder in horror at the rank stankiness on their tongue. Usually fromunder cheese on males only occur in the uncircumcised. But don't cut it, just wash it!
As Mary went to go down on John, she noticed clumps of Fromundercheese under his foreskin. Subsequently Mary never gave head to John again.
A milder variant of the term fromunderjuice implying that ones "fromunderjuice" has taken on a more melancholy tone pertaining to that of fresh Brie or in extreme cases certain varieties of Blue Cheese
A matter of persona hygiene: "Damn I forgot to wash my genitalia this morning, my **** skin smells of fromundercheese"
As an insult: "Eat my fromundercheese you unhuman fiend"
The 'john' asked me if I would eat his Fromunder cheese for an extra buck. I asked him what kind of cheese was 'Fromunder cheese'. He replied back saying, "You knowthe cheese Fromunder the head of my dick".
White cheesy shit that collects around a girl's pussy lips and clit when she doesn't wash it. Some dudes dig licking out their girlfriend's Fromunder Cheese.