A slang term referring to the idea of an old, non cleansed area underneath a males penis. Usually, From-Unda-Cheese is used as a deragotory term to insult or make fun of a boy who doesn't wash his genitals, or even shower at all. The word can also be used to play a joke on a female or male because when said quick enough, it sounds like Fromundacheese... which could quickly be interpreted as a type of cheese.

(n) frum um bo-The unpleasant odor from a woman's perineum region. Like 'from unda cheese' on a man and caused by the accumulative smells of the vagina and anus. A gumbo of smells..... Fromumbo

filmy build-up underneath the testicles. Also known as From-unda-cheese.

The cheese or pasty smell from behind your nut sack.

Cheese like substance from the under side of testicles due to poor hygien.

It the cheese that come from under the foreskin!!!!

The accumulation of fermented "Duck Butter" from under the male gentiles. It creates a thick layer on the "gooch" that looks strikingly similar to cheese.
Fromunda' refers to "From-unda my nuts!"