A fork of Rural Dictionary
The combination of smells and substance that accumulates "from under" you private parts when in need of shower.
George grabbed a quick shower to wash his fum-unda before his date.
Dried from under cheese(Shmegma
This dried fum unda chittle has caused rashes and cuts around my thighs
Cheese like substance from the under side of testicles due to poor hygien.
How about some fum unda cheese for dinner bitch.
The smelly cottage cheese like crap that is found under a mans bells.
The maintence guy never takes a shower he probably has the worst case of fum unda butta!